Is it worth it? I don't have any tier pieces, and have a mismatch of Highmaul Mythic, Heroic/WF and Blackrock Heroic gear, sitting at 678 ilvl (my armory is in my signature if you want to have a gander).
I ran sims, one light movement, one hectic add cleave in my current gear (keeping multi + ogglethorpes for survival, changing to haste/hemets for bm).
Judging by these, would it be reasonable to just change to BM while doing reasonable heroic progression?