it all depends on weather there moves and strafers or stand still dpsers.
The movers can be a little tricky and im still trying to get used to them. Often all i can do is shock, heal fire nova and shock and they are usuaily dead by then, moving your main making your toons face the same way while chain lightning is tricky but thats the only other good way and replace the healing with that. If there just standing there with straight dps shock, chain lightning lightning bolt and there dead, those guys are ezmode.