Thanks everyone for your tips and advice. One question that I'm not 100% sure on, does engulfing magic hit anyone in the twilight realm? Meaning if someone above gets engulfing magic can they hit someone down below?
Engulfing will not hit people in different realms. It will however persist through to the other realm when you take a portal.
Send more than just the Mages down on the 2nd and 3rd IMO. Or you can just zerg the boss without sending anyone down. Did that this week ^_^.