Haste (magical) and DPS

kelben · 03/01/07, 1:57 AM

Concerning passive haste rating items like the Blade of Wizardry and Quagmirran's Eye with a 15% chance to proc for a ~25% and ~30% (respectively) increased casting speed, how does that stack against weapons / trinkets with more dmg and or with %crit/%hit. Anyone have some math on the subject? Ie how much haste is equal to 1 dps or something along those lines. I'm personally using both the sword and the eye and greatly enjoy having haste up on a semi constant basis but I'd like to see the math on the subject. I do realize the effect changes based on spec (10/48/3 current - mage) but there has to be some common ground on which haste ratings can be given a rough dps estimate.

Blade of Wizardry
Binds when equipped
Main Hand Sword
31 - 117 Damage Speed 1.80
(41.4 damage per second)
Durability 105 / 105
Requires Level 70
Equip: Increases damage and healing done by magical spells and effects by up to 150.
Equip: Your harmful spells have a chance to increase your spell haste rating by 280 for 6 secs.

Quagmirran's Eye
Binds when picked up
Unique
Trinket
Requires Level 70
Equip: Increases damage and healing done by magical spells and effects by up to 37.
Equip: Your harmful spells have a chance to increase your spell haste rating by 320 for 6 secs.

kelben · 03/01/07, 3:09 PM

Well in order to spur some converstation on the subject - my poor math skills end up with a rough estimate of a 4.5% DPS increase for the swords proc... I ran the topic by another another mage and we hashed it out a bit but he agreed that 4-5% increase should be the end result. From my limited testing it appears the procs do stack, however there does seem to be a PPM limit on the sword and trinket as I didn't seem to get back to back procs but any addtional info on the subject would be greatly appriecated. I'll be downloading proc watcher and see if I can come up with some more stable numbers.

Twid · 03/01/07, 3:17 PM

Proc per minute is a term that applies when defining a percent chance to proc on different speed weapons. It does not mean that there is a hard cap on number of times per minute that a proc can occur.

I would be interested to see if they implemented an actual proc per minute on those items however, with longer spell casts having a higher % chance to proc the haste effect.

If there is no actual way to get procs on successive spell casts, what you could be observing is a "cooldown" on procs, similar to what is seen with Windfury.

*edit* Nevermind - http://www.thottbot.com/?sp=33297 if correct, indicates a flat 15% chance to proc. Same with http://www.thottbot.com/?sp=38319

Aramul · 03/01/07, 4:30 PM

The Blade of Wizardry has been said to have a 30s cooldown. Between that and the 15% proc rate, you can expect a proc every ~50s on a 3.0 cast time spell. You can do better if fishing for procs or using a number of instants, but 6s out of every 50s is not so hot. Far better to get a solid raid drop (Prince's dagger) and use the 2+kg you would spend (or would gain by selling it) on epic craftables and gems.

kelben · 03/01/07, 8:29 PM

It appears the sword has a 3 proc /min (maybe a tiny bit lower need to run the proc watcher mod over a longer period of time)

Tempestra · 03/01/07, 8:42 PM

I've heard of the 30 second cooldown on the Blade of Wizardry, but I'm wondering:
(a) does the Eye have a similar cooldown?
(b) can we get confirmation that one proc would start the 30 second cooldown on the other?
(c) if they do in fact share cooldowns, all having the Blade would do would be to push the proc from once every 50sec~ closer to 40sec (in essence having a 30% chance to proc a haste from either weapon or trinket, and both having the cooldown). Meaning, go get the trinket because the sword doesn't add marginal value?

Originally Posted by kelben

It appears the sword has a 3 proc /min (maybe a tiny bit lower need to run the proc watcher mod over a longer period of time)

If this is the case, then can we conclude that they don't share 30 second cooldowns? Because one item alone can't proc 3 times per minute if it has a 30 second cooldown on the proc. Is the cooldown less than we suspected, or were you using two items and getting procs from both?

Edit: I'll admit that I may have a chance to buy the sword for 3k and am seriously considering it. I will get the Prince Malch dagger when it drops though, and am wondering whether it's worth the investment (I'm fond of how well spell haste scales with gear) and if it stacks with the quag eye trinket.

kelben · 03/01/07, 9:01 PM

Just monitoring the sword - proc watch can only watch for one message at a time so I'll do the trinket next... but it seems like the swords cooldown is around 20-22 seconds

probiscus · 03/01/07, 10:16 PM

The blade doesn't have a 30 sec cooldown.

It's pretty sexy for affliction warlocks (what I'm using it for).

As far as % dps increase, you could quantify it, but that would belittle the benefit you derive from UA spam in PvP and/or SoC spam in either PvE or PvP.

zancii · 03/02/07, 9:07 AM

To cross-reference some rogue discussion about the trinket Hourglass of the Unraveller in the Rogue DPS Spreadsheet. Starting at post #546, continuing for a few pages, and ending about post #571.
It was concluded that items with a chance to proc a buff for x seconds have a hidden cooldown of: 3 x length of buff. The hidden cooldown for both of those items should be 18seconds.

Tempestra · 03/02/07, 1:02 PM

Originally Posted by zancii

To cross-reference some rogue discussion about the trinket Hourglass of the Unraveller in the Rogue DPS Spreadsheet. Starting at post #546, continuing for a few pages, and ending about post #571.
It was concluded that items with a chance to proc a buff for x seconds have a hidden cooldown of: 3 x length of buff. The hidden cooldown for both of those items should be 18seconds.

So I went ahead and bought the Blade last night for around 2700. I'm pretty happy with it. My only concern would be once I get Quag's Eye, the cooldown will be initiated for both. At the very least, I have an amazingly expensive torch main hand.

Thanks for the link though, and I'm glad that there's an underlying rule to the madness, rather than arbitrary values (if you count Windfury as a "1 second" proc, then the 3 second built in cooldown would match this rule?).

Dinadass · 03/02/07, 1:50 PM

I'd probably rate Quag's eye as the best overall DPS trinket now that the lightning capacitor is being nerfed. I love it as an affliction warlock, even though I feel like I don't get as much out of it as I would were I destruction. It's awesome when it procs off my last DOT in my rotation and I can fire off 3 Shadowbolts at 1.92 seconds each, but it's not so great when it procs at the start of a fight as I'm casting a bunch of insta-cast DOTs and Curses.

I probably wouldn't use the sword unless I had more money than I knew what to do with. The proc is definitely nice, but picking up another ~30 damage, stam/int, and crit probably outweighs it, especially if you already have a Quag's Eye.

Nork · 03/02/07, 1:56 PM

I have both and they don't share any cooldowns. I've had them proc off the same spell, and I have had the trinket proc on the cast immediately following a sword proc (and vice versa).

kelben · 03/02/07, 5:41 PM

18 second cooldown feels about right - i was guessing around a 20 second cooldown and the eye and sword can stack for a 50% haste rating... but what I was hoping for was someone brave enough to prove that either the haste rating was superior or inferior to that extra dmg / extra crit

Stein · 03/02/07, 6:05 PM

Originally Posted by kelben

...but what I was hoping for was someone brave enough to prove that either the haste rating was superior or inferior to that extra dmg / extra crit

This is so sensitive to context, it's hard to come up with a rule of thumb. It depends on what spells you're casting; thus on your class/spec. It is a function of your DPS, so this scales with your gear (and a = 23 +dam kind of evaluation depends on your gear).

The easiest one to figure out, imo, is a frostbolt spamming mage. to begin...the proc would happen on the 6th spell (6*2.5+.2lag = 16.2 sec); 6 sec of haste; 12 sec of cooldown; repeat;

so that's 6 of 34.2 sec hasted...17.5% uptime * haste%...4.4% for sword, 5.25% for trinket for a frost mage.

using Vontre's spreadsheet (http://www.radiationnow.net/wow/mage_dps.xls ) with his default stats and his deep frost spec, frostbolt spam does 527 dps. 4.4% of that is 23 dps. the extra 28 +dam, 21 crit rating & 15 int provided by the Nathrezim Mindblade adds 17 dps.

So, for a frost spec'd mage, the sword is 6 dps better...which is about the same as +14dam.

it's a lot trickier for other specs/classes. I think new haste procs don't reduce the GCD, so scorches, fully ramped up AB, instants gain no benefit from it. however, those faster spells done to begin might cause the proc sooner?

kelben · 03/02/07, 6:34 PM

Followed the same math you provided above but swapped numbers around for pure fireball spam and ended up with the sword doing 5.5 more dps than the talon of the tempest (best dps main hand around - put the best craftable gems into it)

the proc would happen on the 6th spell (6*3+.2lag = 19.2 sec); 6 sec of haste; 12 sec of cooldown; repeat;

so that's 6 of 37.2 sec hasted...16.1% uptime * haste%...4.19% for sword for a fire mage.

using Vontre's spreadsheet (http://www.radiationnow.net/wow/mage_dps.xls ) with my stats and a deep fire spec, fireball spam does 873 dps. 4.19% of that is 36.5 dps. the extra 28 +dam, 24 crit rating & 11 int provided by the Talon of the tempest adds 31 dps.

So, for a fire spec'd mage, the sword is 5.5 dps better...