Heroic Scarlet Monastery: Halls

[Apatheist]

Blademaster:

I stand on the platform opposite where you enter (between the two staircases). My team is all stacked up with the tank facing boss away from team. When he jumps into the middle, wait for him to pick a side then jump down. You can continue to DPS while he spins around (if your team is ranged), then just run your team back up the stairs when he comes back down.

If you position it properly, he will kill all the adds as he spins around. Very easy fight.