Hunter is by far my most effective, Warlock is in it's early stages but is easily #2.....Titan, aside from the panic-super, I find it so clunky and actually the most vulnerable without it's super, great grenades but when you have none and enemies around you, you literally have no options but to try shooting yourself to safety because the jumps are slow, and melee puts you in melee range with very little lunge to it. Hunter has exceptional evasion skills with it's controlled double jump or Blink. Warlock's Melee skill is the unsung hero of the class as you effectively push back, stagger opponents without getting in melee range of them.