Aff is not a problem when you know how to play it. Throw in the legendary gem and it easily pulls ahead. The portal, while very situational, was paramount in the green fire questline to totally avoid any chaos bolts...it has the same effect anywhere else...but then again if you are having aggro issues your tank is doing something wrong or is afk. Aff has always been the king of sustained damage with demo and destro being the spiky ones...actually the only time it wasnt was late BC where the god awful SB spam took the reigns of most OP spec in the game.