Actually a warlock can generate lots of orbs if used correctly. I have a warlock on the side and barely EVER have to use self res, its about the player not just the character. If your teammates start to go down the warlock can run in with less concern because hey they have self res. Let a warlock carry the shield/sword because if its dropped they can. Self res and pick it back up. Warlocks can be very useful your just ignorant.