You probably need about 9k to tank T9, few ravens in phase 0, ghosts at the start of the actual fight (they do hit like trucks), finally picking up if MT derps. 80% of the time youre a gimped DPS, so I dont see any reason to stack parry or vit.
For progression though like most ppl here, stack vit, cuz it helps healers tremendously even if you dont realize, an extra GCD here and there makes alot of difference.
Our warrior uses STR acc on our clears, so if your healer thinks its okay to drop a few hundred HP for tighter GCDs, then do it.