Originally Posted by
Ichifails
Look at the plots and see how much Mastery you need before Haste becomes better again :P.
You can have a situation like:
14000 haste
12000 mastery
But mastery could only be better till you get let's say 13000 haste and 13000 mastery... and after that so you have to stay at 13000 haste and add mastery after.
If you went for 9000 haste 17000 mastery, of course haste will be better till you get back to 13000 haste.
THE NUMBERS ARE FICTIONAL, JUST TO GIVE YOU AN IDEA!
Real life example: If you have 9777 haste as Affliction, simcraft will tell you haste is better than mastery. You actually only need 1 point of haste to get the 9778 haste breakpoint and after that mastery will be better so going all out and reforging/gemming mastery would be silly.
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I'd say you should get at least 3. With DS and t15 2p you should get 4 without much trouble. Most of the fight you should hover at around 3.5 embers so when an int proc comes, you have 3 CB's ready to fire in a 10 second window. I'm at 9800 haste and not in a raid group and my CB cast time is 2.43sec. That would leave ~2.5 seconds to move and still get 3 CB's with the int proc.
Worst case scenario: You are at 3.5 embers, you cast 1 CB and right after it goes off your 10 sec int proc comes up so you are at 2.5 embers and the first CB did not benefit from it. You use 2 CB"s and you have 5 seconds left to generate half an ember and cast another CB... and that's easy so you get 3.
Best case scenario: You are at 3.5 embers, you cast 1 CB and int procs comes up right before you finish the cast. This CB will have the Int proc (since CB damage is calculated the second the cast is finished not started) and you will have 2.5 embers. You cast 2 more CB's and have 5 seconds to generate 0.5 embers and cast another CB... this way you got 4 CB's with a 10 second int proc.
I'd say 3 CB's in a 10 seconds int proc is kind of the average you should aim for... that if you didn't have another int proc before that didn't leave you time to get back to your 3.5 embers hovering point.