Minimize the Life Drain/Force of Will RNG by not all bunching up behind the Life Drained person.
If you're all queued up like ladies at a toilet, FoW will end up there.
The maze is a lot clearer now, but it's still a bit crappy. Sometimes the path just seems to disappear. Sometimes it seems to open up, then closes again. Just have to get used to it really. It was one of the easier bosses for us, we downed it within a few hours. The only things different to LFR are the beams and the lethality of Force of Will.