I've been lvling my hunter the past two weeks, and it's lvl 80 now, probably 85 tomorrow or the day after. So far, I've built two characters for PvP (warden and champ), but I have no idea what to focus on with my hunter. Should I stack tactical mit because the class is so squishy, or should I neglect it, because it's so squishy anyway? What critical rating/PM should I be aiming at? Also interested in relics/legacies.

Thanks in advance