Originally Posted by Warlocomotif
It's multiplicative, ie, with 1400 haste from gear the cast time of a spell would like like:
hasted cast time = normal cast time / 1.05 / (1 + (haste rating / 3279))
[edit]
I've also had a closer look at SB vs Incin, and ignoring shadow bolt is still a pretty noticeable DPS loss. I don't recommend it unless you're having an extremely hard time with your rotation.
|
Okay wow, adding in Wrath of Air changes things greatly.
With Wrath of Air here are the haste areas you want to avoid:
1.5%-4.7% (impossible to refresh HoG after the first refresh)
15%-23% Time between HoG cast ending and Immolate Debuff ending: .9s starting at 15% - .1s at 23.8%
(oddly enough when you hit 23.81% it jumps back up to 2.45s between HoG cast ending and Immolate debuff ending)
37%-42% .9 - .5
So if my math is right, without Wrath of Air you need to be under 23 or over 30% haste, and if you have Wrath of Air you want to be under 15% or over 23%. To convert that to rating:
Bad: 491 - 780 (might actually be impossible to refresh with 750-780 haste)
Good: 781 - 1233
Mediocre to Bad: 1234 - 1405 (gets worse closer to 1405)
Good: 1405.3+
Literally once you hit 1405.3 rating with Wrath of Air everything becomes peachy.
This is, of course, assuming the formula you posted under the notes section regarding Immolate/HoG is correct.