Just kind of a experience, and thought pooling thread.
Through my little experience, seems as though the three are:
1: Mastery (For General damage reduction)
2: Stamina (obvious)
3: Spellpower (For fury ward)
But as of now, with no real direction with my gear tward tanking, I can just barely slide past in heroics, what are you other Lock-tanks doing for your gear, and speccing, out of curiosity?