I think if you looked through the sticky, you will see some viable "builds" stat priority.
What's your ilevel now? I'm at 851, with 18% haste, 30% mastery, 9% versa and I can do mythics + 4 +5 comfortably. Mythics normal are a joke now. With some good gearing, and proper balance of stats (30% haste gibes your other stats too much i feel), brews are really fun to play.
I use HT/ED (HT for just smoothing of dmg, while ED has huge purifies which is really nice for content that hits harder). I use BoB because i like to keep ISB almost 100% and still have 2 charges for purify.
The gameplay of brew keeps me on the edge at times, and to have control over your dmg is nice (Fortifying, I have the neth lair trinket mythic titanforged along with the bubble one from EOA as well) these trinkets help a fair bit.
http://us.battle.net/wow/en/characte...an/Daet/simple