Originally Posted by
Okay
I'm actually shocked that you are rolling survival for this fight. If the only two options you have between SV and BM, BM would be the superior choice out of the two unless you're doing engineers then it would be mm>sv>bm. Survival is really unreliable on this fight due to the amount of rng required. Such as going phase 3 without any 4p procs (which have a 60% chance to happen) would be devastating as the boss would be up for a ridiculous amount of time putting high stress on your healers.
As BM you really have to go mastery>haste>crit in order to keep up with the aoe required in phase 1 and along with that it's more reliable burst damage that you have full control over. The more crit you have the more of a gamble you put on your dps which you shouldn't be doing in p3+ anyways. Mastery>haste gives you a predictable, reasonable dps boost which will prove reliable (unlike SV) in the long run.
Personally during our first and second pull on 25m H garrosh we had 2 MM hunters and 2 SV hunters. Eventually we had to sit one the SV hunter before the third pull because rng just wouldn't allow him to keep up with everyone else and he didn't have a BM or MM spec and the other SV hunter had to go BM/MM in order to push out the required dps. I'm sure with good rng though that wouldn't have been needed but the spec is such a gamble on this boss.