Originally Posted by
Nairobi
Playing Devil's Advocate here; what you're suggesting in this case would be Mastery stacking (which is what most Prot's on Sha did), since you were only concerned with Dread Thrash. Haste would only buff your ShotR uptime on the "non-consequential" melee outside of Thrashes, and provide its passive DPS/HPS benefits.
Not arguing that, as Mastery is our strongest actual tank stat, but simply saying that I feel that I, personally, get enough from gear/Might to mitigate effectively, ergo I push haste in 10m settings, even on t15 HC progression, for the other passive benefits it provides. I've not gotten far enough in heroics yet to feel the need to switch to Mastery stacking, but as my ilvl continues to increase, I am afforded the luxury of maintaining both stats at a decent pace. That said, having now hit the 11k mark, I'm feeling that I may start working to up my EH a bit more as we look forward to later bosses, but that's going to be a judgement call after this week's progression.