Update 4.01: This thread will soon be superseded by a new Arcane thread - intended to fully discuss Arcane as it is ingame, and offer information on spec/mastery/rotations. Much of this thread is discussion on problems with Arcane, from design and thematic viewpoints, while the new thread will focus on Arcane ingame and be your resource should that be your chosen spec. Logix will be making this new thread shortly.

Preface and Resource Links

This thread is an opportunity for a consolidated discussion to explore all aspects of Arcane in Cataclysm: Talents, Mastery, design direction, playstyle and concerns. You'll quickly notice that the tone and sentiment of Cataclysm Arcane discussion, is very different to that of Cataclysm Fire or Frost. Arcane currently has many issues, and many people are quite frustrated or disappointed by the spec. With that in mind, this is still not a place to mindlessly whine or play armchair designer, but to constructively discuss Cataclysm Arcane in detail. Some resources pertinent to Arcane Mages:

- Cataclysm Talent Calculator: Mage
- World of Warcraft - English (NA) Forums -> Cataclysm Class Preview: Mage
- World of Warcraft: Cataclysm Beta - (English) Forums -> [Mage] Arcane suggestions
- World of Warcraft: Cataclysm Beta - (English) Forums -> Mage
- World of Warcraft - English (NA) Forums -> Arcane Mages in Cataclysm

Key Blizzard Quotes

Because much of recent Arcane discussion and concern stems from several key Blizzard quotes, these are pasted in full below.

Key At-a-Glance Cataclysm Changes Relevant to Arcane

Most Recent Beta Build Changes (12942)
- Arcane Blast new tooltips reads, "Blasts the target with energy, dealing X to Y Arcane damage. Each time you cast Arcane Blast, the damage of Arcane Blast is increased by 20% and mana cost is increased by 175%. Effect stacks up to 4 times and lasts 6 sec or until any Arcane damage spell except Arcane Blast is cast.".
- Arcane Missiles and Arcane Barrage no longer receive the damage bonus from Arcane Blast stacks. Only Arcane Blast itself benefits from the damage bonus.
- Improved Arcane Explosion reduces the GCD of Arcane Explosion by 0.5 seconds and reduces threat generated by 80%

Other Changes
- Arcane Specialization increases the damage of your Arcane spells by 25%.
- Mana Adept increases all spell damage done by up to 12%, based on the amount of mana the Mage has unspent. Each point of Mastery increases damage done by up to an additional 1.5%.
- Arcane Missiles is now a % based proc, learnt at level 3, which has a 40% chance to activate after casting any mage spell. It longer gets a damage bonus from Arcane Blast stacks.
- Arcane Barrage has a 5 second cooldown. It no longer gets a damage bonus from Arcane Blast stacks.
- Nether Vortex interacts with Slow by passively applying the debuff to unafflicted targets
- Improved Mana Gem allows a Mana Gem to act as a DPS cooldown
- Mage Armor allows the Mage to regenerate 3% of maximum mana per 5 seconds
- Molten Armor no longer scales with spirit. Selfish Crit bonus reduced to 3%.
- Torment the Weak applies only to Arcane spells, has been reduced to 6% damage
- Icy Veins is no longer available for Arcane Mages to pickup
- Arcane Barrage: In one beta build, Abarr gave a 100% chance to proc Arcane Missiles and not consume Arcane Blast stacks in the process. To clear up confusion: This implementation was completely scrapped during the Beta. Arcane Barrage functions the same way it does on live, except it has a 5 second cooldown and its damage is no longer modified by Arcane Blast stacks.

Arcane in Cataclysm

Concerns: Concise Bullet Point Summary

The following points summarize the majority of Arcane Cataclysm concerns in a concise and easy to understand manner. These points are quoted from a post originally authored by Zeldyrr here.

• Mana Adept: The design of this mastery (have more mana = do more damage) seems counter to arcane blast (spend more mana = do more damage). Balancing these two quickly becomes beyond the capabilities of a player just trying to pick up the game. Relying on simulators and out-of-game fan sites is something GC said he wanted to curb.

• Mana Management: The mana management theme could be very interesting, if arcane mages had new tools with which to do the management. Right now you mana gem every time it comes up and evocate every time your mana reaches 40%. These are the same tools available to the other specs.

• Rotation: The current expected rotation is AB-AB-AB-AB-MBAM, 11112. This is pretty much as it has been for all of wotlk. While effective, it's boring and repetitive. A more dynamic rotation that includes other spells like ABar would be a welcome change.

• AOE: Because of the way the specialization bonuses work for mages, casting off-tree AOE spells can be ineffective. Arcane Explosion is the only choice from the arcane tree. Is it intended that arcane mages are the only caster without some sort of ranged AOE? And if this is an "only" that Blizzard is happy with, can AE's coefficient be adjusted? Right now it can't compete DPS-wise with fire or frost AOE capabilities.

• Talent Interplay: Other trees have a "theme" in their talents. For example, some fire talents boost crit chances and other talents proc when spells crit. Arcane talents have less of this interplay. For example, Torment the Weak boosts damage and that's it. No other talent can play off of "6% more damage".

• Arcane Barrage: This is the iconic arcane spell granted at level 10 when the choice of specialization is made. However, it currently has no place in an end game raiding rotation. It would be nice if the "iconic" spell (which has a cool flavor and graphic associated with it) be useful to raiders as part of the standard rotation.

• Limited Spell Choice: The more recent Arcane tree spells (Mirror Image, Timewarp) don't provide options that enter a raiding rotation. Current choices are Arcane Barrage (no reason to cast atm), Arcane Missiles (available only on proc), and Arcane Blast. From this is easy to deduce the only possible rotation is spam AB until the only useful other spell (AM) procs.

• Nonsensical Pre-level 34 Levelling Experience: Arcane mages don't receive Arcane Blast until level 34, which is the core part of the Arcane rotation and playstyle. Not having access to AB means cross-school filler spells need to be used, because of the two Arcane spells available early: One is a proc and one has a CD. Cross school spells cast do not benefit from Arcane Specialisation. All this seems counter-intuitive to Blizzards new levelling vision, aimed at letting players feel like their spec as early as level 10.

What's wrong with Cataclysm Arcane: Discussion

The short version: Arcane is boring.

The longer version: The 'fun factor' has gone missing from Arcane. The rotations are too static. There's not enough opportunity for dynamic or adaptive rotations. The ranged AOE rotation relies exclusively on other spell schools, Blizzard and Flamestrike, both of which forgo Arcane Specialisation. Furthermore, neither of these spells have compelling Arcane talents to compensate or modify them. Arcane mages lack fun, innovative tools and mechanics to control and manipulate their most important resource: mana. Too many Arcane talents lack thematic synergy, nor add much depth or flavour to the Arcane playstyle. We're not empowered with enough ways to manage the Mana Adept mastery.

Cataclysm doesn't appear to be doing much to remedy any of this - and this the reason many are concerned by the current state of Cataclysm Arcane: Where is the thematic, fun synergy that encourages us to mix rotations up and gives the opportunity for added depth and control?

Talent Synergy and Depth

Fire AOE takes advantage of Fire Specialization, excellent thematic synergy, and talents giving the opportunity for depth to skilled players who wish to take advantage of them. (Pyromaniac, Impact, Combustion, Hot streak). The only interaction between Arcane talents/spells and AOE is either very minimal, or just plain boring. Arcane Explosion takes advantage of the Arcane Blast debuff, Arcane Potency might give you a crit after a Clearcasting Proc, and POM can give an instant Flamestrike. What Arcane lacks is more talents that offer depth.

While adding another Arcane ranged AOE spell would be a good step, it wouldn't necessarily solve anything. Mindlessly casting AOE spells (the current Arcane AOE rotation) isn't a particulary inspiring, or fun, design. Adding more spells to mindlessly cast won't change that. Fire is a good example of how talents and spells can thematically work well together to not only add more depth to the tree, but make it much more fun.

Cataclysm Fire has the theme of Dots (The ingame representation of something 'burning'). Do the Fire talents really expand on that theme, and add depth? Yes! Frost has an emphasis on chills and freezes. The question is - do the talents do much to expand on this, give you reasons to care about chills/freezes - and give you fun tools to manage all of this ? Yes! To see examples of how the Fire and Frost talent trees accomplish this, expand the spoiler tag below:


Now finally, lets look at Arcane. It has themes of Mana Management and Magic Manipulation. Lets assess whether the tree expands on that, or adds any depth:

The Arcane package is just not there. It doesn't tie itself together well, unlike Frost or Fire. Using evocation and a mana gem, does not really qualify as compelling mana management. Correct use of Arcane Blast requires good management, but this theme is not expanded on by the talent tree - unlike Dots to Fire. Arcane does have a bunch of 'fun, gimmicky' utility talents (Prismatic Cloak, Improved Blink, Invocation, Incanter's Abosprtion) - but there are too many of them, and too few talents that address or expand on the rest of the playstyle. Many of the remaining talents are just plain boring, or don't offer anything exciting to the tree at all (Torment the Weak, Arcane Tactics, Focus Magic).

Are these talents meant to be mutually exclusive with those that offer more depth to the playstyle? The equivilant to this would be if Fire had only 1 talent that affected dots, and Frost had one talent that played with Freezes - because the rest of the tree was filled up with gimmick talents.

What does it mean to be an Arcane mage? Does the talent tree do enough to expand upon this?

The official talent tree description reads, "Manipulates arcane energies, playing with the very fabric of time and space." Arcane is all about control. Specifically: Control over mana, control over magic, and control over time.

A skilled Arcane mage needs to exercise a great deal of control and manipulative skills over their mana / magic to be effective. The main point of contention is, with those points in mind, the current Cataclysm talent tree is moving away from that completely - even contrary to Blizzard's own comments - towards Arcane being nothing more than a bag of thematically disjointed tricks with a static, boring rotation - and having little to no control. This is counter-intuitive to what an Arcane mage is supposed to be all about.

Fire on the other hand is moving in the opposite direction: Cataclysm fire design direction thus far has been excellent, and the talents are empowering you with ways to manage and control your DOT's.

For an easy comparison, consider the following Arcane Talents: Improved Polymorph, Improved Blink, Torment the Weak, Arcane Tactics, Focus Magic and Prismatic Cloak. What exactly do they add to the Arcane tree? Do they add any depth or fun to the playstyle, do they give you more control? Focus magic gives Arcane some crit, but do other talents make you care about crit? No. Some of them are still indeed fun quirky talents. But can the real-estate scarce Cataclysm talent trees afford all these quirkly talents, when a strong running theme is lacking in the first place?

Now consider some of the new fire talents: More mobility with firestarter, regenerative rotations with Improved Scorch + Master of Elements + Hot Streak, Pyromaniac rewarding skilled players to manage dots correctly, Improved Flamestrike adding a free Blastwave which in turn will offer more Ignite crits and uptime on Pyromaniac, impact new utility can spread dots - combustion can create it's own ignite then consolidate everything else into it. Critical mass gives some crit, but do the fire talents give us a reason to care? Absolutely: Master of Elements, Ignite, Combustion, Hotstreak. Do they help make you feel like a Fire mage? Absolutely.

Arcane just doesn't tie itself together very well. Maybe that's simply because its lost sight of a running theme. Talents that play off mana and magic manipulation fit Arcane well. Improved Mana Gem is an example. Incanter's Absorption and Magic Absorption as well. Other potential good examples would be the current tier 10 bonuses. Both of those fit Arcane well. It would simply take a little rewording to give them a better thematic feel for Arcane. For example, changing the 4 piece tier 10 mirror image bonus to something such as "Your Mirror Image ability also causes you to deal an additional X% of your total mana/haste rating in damage for the next 30 seconds". The 2 piece bonus could be restated as, "Increases your haste rating by X% of your maximum mana after casting Arcane Missiles".

Pasture made an excellent post on this:

So to get the ball rolling, Blizzard has delivered the current Cataclysm Arcane package - what are your thoughts and observations? Arcane discussion is very interesting, because it isn't just about criticising talents or numbers, it's also about you asssessing what you believe it is to be an Arcane mage, and many mages are quite passionate about what that means to them. Not everyone agrees on what this means, and nobody can conclusively say that Blizzard knows either - based on the current Cataclysm model. So where do we go from here?

An idea for the subject of mana management tools:

What about an Archangel type mechanic attached to Arcane Barrage? If Arcane Barrage isn't being changed back to providing a free Arcane Missiles proc, then perhaps it can be changed so that when your Arcane Blast stack is consumed by Arcane Barrage, you regain X% of total mana per AB debuff consumed. That would provide an incentive to use Arcane Barrage if Arcane Missiles proc fishing is unsuccessful after 4 casts.

However, I don't know if that would really provide an interesting mana management mechanic... It's more of a consolation prize for not winning the AM proc when RNG isn't on your side. I suppose it could also be used when a target is low health and the caster didn't want to waste an AM proc but wanted to get some mana back instead for use on the next target (and to bring their Mana Adept score back up a bit).

Ah well. Just another idea.

There's a good opportunity to take the new Holy Power, Soul Shard and Lunar Power type mechanics - and apply them to Arcane. The developers clearly quite like exploring these UI mechanics currently. The idea of using your normal spells and ablities to collect some kind of special resource, and having to make smart decisions on how you want to use that resource most effectively - is a great theme.

Lets say Arcane has a special resource, like the new Holy Power, called "Arcane Power". It would receive its own UI element and is accumulated by casting Arcane Spells. Once you hit the Arcane Power spell, then a normal spell - it modifies the normal spell according to the level of Arcane Power you have. Just like how Arcane Blast currently gives a +damage modifier, but with much more versitility. Arcane Power would replace the need for an Arcane Blast debuff.

Imagine if 4 Arcane Power (equivilant to a 4 Arcane stack debuff) followed by Arcane Explosion - would allow a mage to cast an Arcane Explosion at ranged which pulsed 4 times. Or a 4 stack Arcane Power + Arcane Barrage would cause Arcane Barrage to hit 4 targets simultaneously. They use up the Arcane Power debuff in the process, so you do have an opportunity cost to think about (lose out on single target DPS in these examples). Or perhaps you could use your Arcane Power to modify the effects of a mana gem (make it restore less mana, but give more +% damage via "Improved Mana Gem" talent, or vice versa).

There's no shortage of fun ideas people have been coming up with - the confusing part is, why do the Arcane talents still look so bland and really don't iterate on, or take into account - any innovative tools or mechanics? Torment the Weak, need we say more? "Use mana gem on cooldown" or "Use Evocation on cooldown" is better, but still uninspired.

Our Mastery wants us to keep Mana high, so we need more empowering ways to have control over it to do so. Is Mana Adept working for us, or against us.

I think this is the way you have to go, and Sunaseni did a good job of articulating it in his post in the Cataclysm Changes thread. You have to start with your strategy (talent spec), then flesh out the tactics (spells/abilities/rotations) underneath. We need an overarching theme/flavor/strategy, and the Time/Space idea is the most appealing to me (prismatic sounds like a give-up compromise). Several good suggestions HAVE been made on what it might actually look like in combat. Personal favorites include Vontre's changes to AB, and Ebbie's new proc forcing a choice btwn DPS boost and Mana restore. Adding the current T10x2 to the talent tree seems like a no-brainer. In addition to these, I'll add the following to the brainstorming hopper:

• Change the Arcane Mastery to a Haste increase, essentially accomplishing the same thing, i.e. the more mana you have the faster you cast, the more damage you do, but the more mana you burn through. The more mana you have, the higher your DPS will be. But to make this work, you'd need to give the arcane mage new tools to help him keep mana up.
• New Talent: Improved Mirror Image, X% of MI damage restores Y mana to the caster (shadow fiend model). Maybe reduced MI CD as well.
• New Spell: Arcane Absorption: A buff like Arcane Power (maybe shared CD) that lasts say 15 seconds, that when activated converts X% of the damage the mage does into mana into his pool, but reduces the damage done by Y%.
• New Spell: Mana Suck, drain the mana from the target to the mage (ya, i know only works if the target has mana).
• New 31 Point Talent/Spell: Time Stop. Like the Time Lord's ability in Culling of Strat, everything around the mage freezes for 5 seconds, but the mage can do whatever he wants. Common, who didn't love the first time they figured out you could invis on Professor Putricide.
• On the "space" side of the ledger, maybe the ability to open an portal to a safe little nether world (think portable hole), where others can't follow, but where the mage can do whatever he wants for a short period and where mana is restored at an extremely accelerated rate.
• And yes, of course Arcane should be able to talent up for superior evocates and mana gems (faster, more mana, etc.). Goes without saying.
• Although kinda off topic, but in the "space" theme, a reverse blink would be fun, i.e. the ability to blink your target instead of yourself.

The biggest problem to me is changing arcane missiles to be a proc. For mana management to even be feasible as a theme, you need multiple cycles that will trade off dpm for dps. That's impossible to do with just one spammable spell. There has to be at least 2 spammable spells so that a mage can choose which cycle to use depending on the sequence the mage casts those 2 spells. Arcane missiles being a proc removes much of the decision making from the mage on when to cast it.

Anything that uses up mana is not a management tool, unless there is a choice between skills.

Otherwise, we have

- Arcane Missiles - proc (40%), zero mana cost. Essentially the pivot point for our rotation.
- Mana gem - Restores mana. Increases damage coefficients, as a percentage of maximum mana. 0 GCD.
- Evocation - Restores mana as a percentage (60%) of our maximum mana. 0 DPS over 6 seconds.
- Mage Armor - Restores mana as a percentage (3%/5 seconds) of our maximum mana. Passive. 3% to crit opportunity.
- Glyph of Mage Armor - Unknown. In LK, it provided mana at half the rate of OOC mana regeneration. Passive.
- Glyph of Arcane Blast - Unknown/Invented. Decreases cast inflation to 150% from 175%.
- MP5 gear - Unknown/unlikely. The only MP5 gear in LK was healer gear, nominally, and it has been changed to +spirit.
- Mana gear - Unknown. On-use gear, perhaps a trinket, that restores a fixed amount of mana. 0 GCD
- Innervate - Unlikely. Healer mana budgets won't allow Innervate to be put on a mage.
- OO5SR - Gone. In combat, you regain mana at combat rates whether or not you are casting.
- Invisibility - Unlikely/Expensive. If it took and kept you out of combat, your regen would increase for several seconds.
- Enchant Weapon: Adept - Unknown/Invented. Each damaging spell that lands on your enemy has a chance to return X mana to you.

After putting that list together, I realize that we are missing nearly half the picture for Arcane magery. While Frost and Fire seem (relatively) complete, Arcane is still waiting for its moment in the sun. Blizzard has yet to let us see what the glyph and trinket lewtz are. As I started inventing the Glyph of Arcane Blast, I realized that there were easily half a dozen ways that Blizzard could provide the much-needed mana management to Arcane, with a combination of glyphs and gear. Part of the decision would be having to choose 3 major glyphs from perhaps 5 candidates.

BTW, has anybody ever noticed that "mana gem" is part of "management" -- just leave off the "ent".

An issue about having an interesting rotation is the fact that Arcane only has 3 damaging spells it uses: Arcane Blast, Arcane Barrage, and Arcane Missiles. A spammable nuke with a mana-intensive debuff, a cooldown, and a procced channeled spell. There's more for AOE, of course, but it's single target that's the issue.

Really the only way to add more complexity and fun to the rotation is to add at least one more spell. A dot isn't likely, because that doesn't really fit Arcane's scheme, so it would be between a regular nuke, another proc, or another cooldown spell, perhaps even more than one. If they don't want to add another spell, they could add some reason for Arcane to want to cast Frostbolt/Fireball/FFB. Arcane did use Frostbolt during BC, and adding some functionality to the tree for that option could open up the rotation, whether it be as a proc or a straight-cast. If they didn't mind adding another spell, they could give Arcane another spammable nuke that didn't add the stacks, letting mages choose different mana-intensive rotations: larger burst through Blast, only using Blast for the stacks and then using the new spell, or only using the new spell, depending on the situation.

Right now the Arcane tree also lacks talents that affect the rotation, barring Missile Barrage. They did say that they wanted more trees to have utility, but Arcane's utility is a little excessive, especially so given its shallow rotation. The few straight damage increasing talents like Netherwind Presence, Improved Missiles, Arcane Potency, Torment the Weak, and Focus Magic do little to affect how Arcane does damage. Torment the Weak does add Frostbolt or Slow to the rotation when soloing, but only before Nether Vortex. It's difficult to see how Focus Magic specifically can warrant space in these smaller trees, when it's a talent that does nothing while soloing, and especially because it's yet another talent that doesn't change Arcane's rotation. Another talent that is very shallow is Arcane Flows. PoM and AP are only available to Arcane, and the Evocation reduction seems like it would fit very well as the selfish bonus to Tactics.

As for mana management, Arcane doesn't have anything that Frost and Fire don't have, besides a shorter-cooldown Evocation. Even Improved Mana Gem doesn't do anything, besides rewarding the use of a mana cooldown that Arcane would be using anyway with its mastery. Mana management is the same thing as it is currently, besides the passive regen from using Mage Armor rather than Molten.

The Arcane tree at the moment looks fun, with all the available utility, but it's a shame that it seems to be conflicting with the possibility of a more interesting rotation. All that would need to be added is maybe two changes: a mana-management ability, and the addition of a new nuke/ the addition of a talent that would make Arcane want to use an existing nuke (either as a proc, or straight-casting).

Some of my collected thoughts on Arcane.

1. What the Arcane rotation really needs is a non-proc, non-instant ability that they want to use on regular basis. I would prefer that Arcane Missiles be that ability. This could be accomplished with a talent like Hot Streak/Brain Freeze that replaces the Arcane Missiles proc and makes it baseline. Then, when proc'd would make your Arcane Missiles cost no mana and provide some other benefit: instant cast, hits mutliple targets, fire extra missiles, etc. Obviously there would need to be some adjustment depending on the decided mechanic. But, it would give you more options in rotation, and I think bring back some fun to Arcane.

2. On the topic of AoE, Arcane needs a new talent, mechanic, or spell to address it's inadequacies in this regard. Torment the Weak and Focus Magic are good candidate talents to be replaced.

3. Arcane Tactics needs a selfish benefit and Focus Magic isn't really that interesting. Maybe the two could be mashed into one, and free up a talent for a new AoE ability or mechanic. "Arcane Tactics - Increases your chance to critically hit with spells by 1/2/3%. Also increases the damage of all party and raid members within 100 yds by 3%."

4. Given the existence of Nether Vortex, Slow kind sucks as a talent. So make Slow a pre-req of Nether Vortex by bumping it up a tier and putting Focus Magic (or the new talent replacing it) in it's place.

Torment the Weak and Arcane Tactics are both boring talents. The 100% uptime issue makes is so that the only time TtW is not wasted or a flat damage increase is when your strategy requires you to blow the GCD on Slow. Not that you'll notice. If you have to put Slow up, chances are that there are other snares in the first place. Its benefit is very weak for 3 points in the 2nd tier, considering that Nether Vortex solves the GCD problem (to the extent that it can be solved), and Frost has plenty of benefits from the Chilled debuff. Spread the TtW buff out over slight buffs to Frost talents. Arcane Tactics is exactly the kind of talent that Blizzard wants to kill. I understand the need for raid buffs, but this just seems half-assed.

Contary to popular sentiment, I like the idea of mana management because it forces the smart mage to trade mana expenditure and efficiency according to the needs of the encounter. This is fun to me. It can work as a playstyle, it just needs to be more interesting. TtW and Arcane Tactics should be redesigned to make more sense in terms of this, then. I suggest:

Torment the Weak will be changed to Vortex Siphon and moved higher in the tree- Mage damage spells against Slowed targets now have a chance to burn X of the target's mana, rage, energy, focus, or runic power, returning mana equal to Y + Z% of damage done, whether any was burned or not. Now you have a reason to care when Slow is applied, and more mana expenditure will return more mana. Appropriately balanced, of course. May need another 2nd tier talent for levelling/soloing, but there are already 3 others, Frost is doing fine with Chilled, and TtW is not a very good levelling/soloing talent considering the DPS penalty of the Slow GCD.

Arcane Tactics will now be called Ley Lines - Mage manipulates local ley patterns so that damage spells cause a Replenishment-style buff that buffs the damage or healing of the lowest percentage mana user in the raid or group that doesn't already have the buff. May or may not work outside of group, depending on "100% uptime" problem. Mana expenditure from causing damage increases players' overall mana efficiency, including the mage's. Could be key in difficult encounters, making it a widely desired raid buff. Makes placement of Focus Magic more interesting - perhaps it should be required for this talent.

I see two very large issues with this proposal:

1. You're adding a brand new type of raid buff that no other class/spec has, which is one of the things Blizzard has been actively trying to remove via duplication of buffs across classes (see: time warp, etc.).
2. Your implementation of the raid buff would make it so that raid leaders would want to stack as many arcane mages as possible in order to try to keep the raid buff on as many players as possible.

If it turned out that this raid buff was balanced such that it was good enough that any players wanted to have it, then arcane mages would be "must-haves" and would be filling every available ranged dps raid slot that didn't need to be something else in order to provide some other raid buff. Note that this would be true regardless of whether it was party only or for the entire raid. The parties would simply be shuffled to include as many arcane mages in as many parties as possible.

If it turned out that this raid buff was balanced such that it was bad enough that nobody thought it was at all useful, then we're left with a "useless" talent.

On the topic of Slow's position, Ghostcrawler recently made a post about prerequisites being there as balance. Yes, it would be nice if we could use that point for something else, but if they put a dps boost in Slow's place, then the prereq is basically pointless.

MMO-Champion BlueTracker | Again with the arrows thing, please take heed

As for Nether Vortex, I really don't like the talent. While it does make it simpler for Arcane to apply the debuff and gain the bonus from TTW, it also basically removes a spell from our spellbook. Meanwhile, a lack of spells is something that Arcane already has a problem with. It would be much more interesting, in my opinion, to have Nether Vortex enhance the usage of Slow, rather than removing its use by turning the ability passive. Affecting damage or mana, both things that Arcane greatly needs, would be a plus.

At the very least, changing the activation from Blast to Barrage would fit better. This would give Barrage more of a use (barring later numbers changes), and having it on a spell that isn't our main nuke would make it more of a decision (slightly).