I'm all about survivability in pve. That's why my fav is the titan. With a defender titan I can get through most raids without dying. Next I like the hunter for invisibility. Crouch for invis, melee for invis, take damage for invis, super for invis. It's great to get out of tricky situations and recover health. Warlocks I don't like. sure it's good on nightfalls but other than that I'm not a fan.