There is a way to break the event, and make it even harder. If you kill the first set of two adds he pops when he feigns death, he'll immediately pop a new set of adds when they die, then he'll start regenerating HP. Ever feign death afterward, he'll regenerate his HP back to 100%. Luckily he only spawned the same number of add waves (whew!).
Smacked myself on the forehead after realizing the mistake I just made (been a while since I stepped foot in the zone and couldn't fully remember the mechanics of the event).
Fun event!
Edited, May 25th 2012 3:38pm by Braikkarrii

Blade of Natural Turmoil
Cloak of Nightmarish Visions
Dagger of Evil Summons
Jagged Axe of Uncontrolled Rage
Nightmarish Boots of Conflict
Runed Gauntlets of the Void
Shroud of the Legion
Tongue of the Zun'muram
Wand Harness
Zun'Muram's Spear of Doom