lawlz!
he pops a giant /ra across the screen sayoing he is going to channel arcane one shot kill you..
when you see that run as fast as you can out of LOS (line of sight) and you wont be eliminated..
everyone, including tank should run. he wont follow.
he also teleports many times just before he explodes, so make sure you are ready for that.
very easy boss if you dont get hit with aoe.