I am not an expert but I am an arcane mage and I believe I do fine in raids here is what I just worked up and posted on our guild site to explain what I do in raids as an arcane mage and still do good dps/damage.
Here is a look at my build and some numbers associated with it. For information about your damage, DPS or DPM you can use an addon called Theorycraft2 (curse gaming or google it). You can get an idea of what your damage or DPS will be by changing your talents using TC without making the changes so you can get an idea what will be the best setup for you with your equipped gear or even theoretical gear. There is very little posted about Arcane builds and there is a ton of misinformation about it too, I am by no means an authority but here is my build and some of the logic I have behind it.
One of the first mistakes I think many mages make is the wrong gear for their build, this includes gems. In general I have found that if you are Fire or Frost you want +spell dmg and as Arcane you need a mix of +spell crit and +intel. I think this is the key area most ppl miss; The fact that the Arcane build is reliant on intel and critical hit. I had a balance of crit gems socketed while acquiring the gear I have now but I get enough spell crit from that gear to go intel on gems now. The next issue with the Arcane build is the fact that high burst damage requires a lot of mana so here is where intel becomes a factor. You need a large enough mana pool to be able to sustain some burst damage but you also need a good spell rotation for long boss fights in raids. Here is a look at my talents and then my spell rotations and data.
I am Arcane and have been since a little after the patch, I was fire before that and was actually never frost. I knew what items I wanted to acquire months ago for my build, this is important too since arcane is so much different from fire or frost, you need different gear. For an arcane build the “Badge” gear from Shat is the best (with a few exceptions of course) but the badge gear can be acquired by anyone. The same will be holding true for Sunwell in 2.4, there are some good badge pieces including weapon and chest for an arcane build to be had when the patch go’s live so save badges. Now for the facts:
Arcane 48
Fire 13
Frost 0
Arcane
Arcane Subtlety: 2/2 Arcane Focus: 3/5 Imp Arcane Mis: 0/5
Wand Spec: 0/2 Magic Absorb: 5/5 Arcane Concentr:5/5
Magic Att: 0/2 Arcane Impact: 3/3 Arcane Fort: 1/1
Imp Mana Sh: 0/2 Imp Counter Spl: 2/2 Arcane Med: 3/3
Imp Blink: 0/2 Presence of Mind: 1/1 Arcane Mind: 5/5
Pris Cloak: 0/2 Arcane Inst: 3/3 Arcane Potency: 3/3
Emp Arc Msl: 3/3 Arcane Power: 1/1 Spell Power: 2/2
Mind Mastery: 5/5
Slow: 1/1
Fire
Imp Fireball: 0/5 Impact: 5/5
Ignite: 5/5 Flame Throwing: 2/2 Imp Fire Blast: 0/3
Incinerate: 0/2 Imp Flame Strike: 0/3 Pyroblast: 1/1 Brng Soul: 0/2
Ok; the biggest thing here I have different from the “conventional wisdom” is that I don’t use arcane missile in my rotation much and didn’t even have empowered till recently and still do not have Improved Arcane Missile. I have a rotation that uses pyroblast on a boss fight with of course Arcane Blast. The only time I cast Missiles is when I get a Clearcast during a boss fight, I will post some basic numbers in a minute and why I do that rotation. I also have Magic Absorption, it is usefull only in specialized cases but I like it, a 5% jump in mana during a fight is a nice perk and I can tank illhoof adds with this skill in full fire gear and low mana and I think it may be useful in Sunwell but that’s speculation. Some ppl also don’t go for the Arcane Fortitude but it really can help keep you alive when you take a shot and in the patch its getting doubled. I also have improved counterspell mostly to just pull casters, maybe not the greatest raid skill but useful everywhere else and it can interrupt bosses in some cases even if they are immune to the silence. I also didn’t have Empowered Arcane Missile for a long time and did have prismatic cloak, hopefully I have enough Stamina now to survive but contrary to other posts I have seen I have to say I can credit that ability for my survivability up until now because much of my gear lacked stamina I could get Intel and Spell crit both on an item. Many also think slow is a waste and I will admit it has only specialized uses but when you need to kite or slow a ranged attack its very nice, many mobs and bosses are immune to it but many mobs and even bosses are affected by it, I like it but I have to say it’s a preference; Right now I cant really give a good raid reason for it other than mobs I’m spamming polymorph on I keep slowed to try to keep them off me long enough for poly to land. The next decision I made was to also use the fire tree all the way up to and including Pyroblast. I like to use pyroblast in my rotation instead of arcane missile because it not only resets my Arcane Blast timer but I can leach off a fire mage in a raid situation and get the extra 15% damage even though I don’t have Improved Scorch, making the pyroblast actually more efficient than arcane missiles. Arcane Missiles will overall on average do more damage than a pyroblast so when I have a clearcast I cast Arcane Missile. I also took Impact (I used to have improved FB but I never cast fireball so I switched over to impact), I also chose Flame Throwing pretty much to be able to pull Krosh and to be able to be at max range and still DPS. I think that about covers it for my talent build, here are some basic numbers I got from Theory Craft, the damage listed includes calculations for critical hits and dots and, assumes only Arcane Intellect and Molten Armor as buffs:
Arcane Blast (times shown are actually w/o spell haste so real DPS is slightly higher)
AB0
1777 dmg 195 mana 9.11 DPM 2.5 second cast 710.8 DPS (740 with haste)
AB1
1777 dmg 341 mana 5.21 DPM 2.17 second cast 818.9 DPS
AB2
1777 dmg 487 mana 3.65 DPM 1.83 second cast 971 DPS
AB3
1777 dmg 633 mana 2.81 DPM 1.5 second cast 1185 DPS
Arcane Missile (Empowered)
4035 dmg 784 mana 5.15 DPM 5.0 seconds cast 807 DPS (840+/- w haste)
Pyroblast (5/5 ignite)
2686 dmg 500 mana 5.37 DPM 6.0 second cast 448 DPS
With 5/5 scorch on a mob
2751 dmg 500 mana 5.50 DPM 6.0 second cast 458 DPS
My rotation is usually AB0 -> AB1 -> Pyroblast
I have enough mana regen to keep this basic rotation up almost forever but if I’m about to lay on some hardcore DPS and don’t care how much mana I’m burning I will get my Arcane Blast all the way up to AB3 and press my “nuke” button, nuke is a macro to (activate Arcane Power; activate Presence of Mind; cast Pyroblast). I then go into a heavy rotation of Arcane Blast and maybe even a fireblast when its up if I really have a lot of mana. In cases where a mob is highly fire susceptible I may do a pyroblast and and hit the “nuke” macro while its in the air and that will give me 2 instant pyroblasts while Arcane Power is active and then go into w/e else rotation after that.
As for gear here is a look at my current stats:
(includes AI and Molten Armor)
Bonus Dmg: 998 Arcane and Fire and 948 Other
Healing: 820
Hit rating: 31 (I get my hit from Arcane Focus)
Crit Chance: 32.49%
Pen: 10
Mana Regen
167 / 5 while not casting
54 /5 while casting
Intellect: 659
Armor: 1659 / 13.58% mit
Here is a look at my gear right now for those numbers:
The World of Warcraft Armory
Until I change that =)
Mana-Binders Cowl (badges)
Ethereum Torque of the Invoker (Gul’bor Ethereum Prison)
Mantle of Tirisfal (Void Reaver)
Shawl of Shifting Probabilities (badges)
Windchanneller’s Tunic of the Invoker (Yor)
Wristguards of Tranquil Though (badges)
Nathrezim Mindblade (Malchazar)
Fetish of the Primal Gods (badges)
Carved Witch Doctor’s Stick (badges)
Shiffar’s Nexus-Horn (Skykriss)
Battlemaster’s Depravity (badges)
Ring of Cryptic Dreams (badges)
Violet Signet of the Archmage (Karazhan rep)
Boots of Foretelling (Maiden of Virtue)
Pantaloons of Arcane Annihilation (badges)
Voodoo-woven Belt (badges)
Studious Wraps (badges)
As I said this is not the best in the game approach or gear its just what I do as an arcane mage to remain viable in a raid =)
The Adept