It is my understanding that the proper way to complete this event is to kill the random spawn (void shard? can't remember the exact name), and then pull the death orb to the entity in the top room. Sometimes I can get this to work, most of the time... I die.
Because of that the way I end up doing the event is using my Mage pet to kill the spawn and then kiting counter clockwise in the same direction of the orb travel. Although this method works, it is very inconsistent. There are runs where my mage does not die once, and then there are runs where he dies every time.
Long story short, am I missing something or has this been everyone's experience? Any tips or tricks would be greatly appreciated.