Why not DPS on Healer? Honestly after healing Expert I don't know why you wouldn't DPS. Just standing there waiting for the tank to lose a bit of HP is just silly. If the enemies hit harder then sure stick on healing but they hit like pillows :/
I think you may need to do Hall of the Novice because even they say if everything is fine tank/dps full hp and most adds almost dead don't be afraid to throw out some damaging spells.
