I’ve been feeling kind of ambivalent about haste (and by extension, Eradication). General knowledge says: “Haste good. More haste, more good.” In general I agree.. but in the specific case of the Affliction warlock I’m still hesitant.
-IF- I’m chain casting haste-able spells then haste is the bomb. It lets me get one-more-spell into the “normal” cast time for the spell thus increasing my DPS.
But.. what if the spells I’m casting don’t benefit from haste?
Spells I use that immediately benefit from haste: Shadow Bolt, Drain Soul*, Drain Life*
Spells I use that are bound by GCD: Haunt, Unstable Affliction, Immolate, Corruption, Curse of Agony, Siphon Life
So.. Shadowbolt, which makes up ~20-50% of my DPS is immediately effected. Right there, that might be enough for me to start valuing haste. Faster cast Shadow Bolts means more Shadow Bolts means more DPS. But I’m not sure how “faster cast time” of Shadow Bolts stacks up against “more spellpower” though.
But there’s still a lot of spells in that second group. Those bound by GCD. In patch 2.4 Haste was changed to effect the GCD. In effect, you need 50% haste to reduce the GCD to 1 second (ie, casting at 150% normal cast speed). At 80 that’s 1639.5 haste rating. ZOMG! That’s HUGE. That’s like unattainable huge.
Then again, reading over the talent Eradication it says “Your Corruption ticks have a 10% chance to increase your casting speed by 20% for 12 seconds.”
Whoa.. suddenly this is just got interesting.
Assuming I’m keeping my Corruption up (and why wouldn’t I.. it hits hard and procs Nightfall) Eradication looks pretty sweet. If Eradication pops.. then I’d only need an addition 30% (984 haste rating) to reduce the GCD to 1 second. That’s still huge.. but not as huge. Even if I don’t have the additional haste, that’s still 20% more spells in the same amount of time.
Assuming I don’t fat-finger it.. and can actually take advantage of the reduced cast time.. this means an overall increase in DPS. That sound like a win.
Wowwiki: Casting Speed
Drysc wrote: “Haste will reduce the global cool down on spells, down to a minimum of 1 second. It won’t apply to melee and ranged abilities though however.” (so no effect on GCD for hunters or melee)
32.79 haste rating = 1% gain in speed at 80
*as of patch 2.1, haste effected channeled spells as well.