I find that rogues (or any backstabber) is incredibly powerful. Give it some haste, make it go to town. Too close to die -> walk with the shadows.
Some people say rangers are good too (btw havent read this thread yet) but cant say I would agree that much. Maybe they spam the custom arrows all the time? Not sure, I use them but only when I feel pressured to do so. I always worry that I will need those arrows in the future (which ends up with me stockpiling some of them :P ).
