for garalon, all modes, 25normal/10, and 25/10 heroic profiles worked well before 2.15 personal, using mangle on the legs is the best thing you can do because shred uses too much energy, and to symbiosis a lock to swap rips to legs from body if you wish

build 2.15 personal got me through 5/12 past two nights in raid, tip for turtle boss is that you can stand far to the sides of the boss and it will think you are behind and so you can successfully shred=yay! but yes feral is pretty weapon damage dependent still
version 2.1.6 personal is working well with doc as well as with NV