Originally Posted by
GuyWithFace
It's actually a VERY good idea to DPS him in p2. We have our melee on the Prototypes, and our ranged on Nef.
In p1, we drop him down to 74% or so, then in p2, we get him to 53% or something close. The only real hard part of the fight is tanking the adds in P3. It's INCREDIBLY hard to kite them effectively, while avoiding fires, so the less time you spend in p3, the better.(Expect your tank(s) kiting the adds to die. Repeatedly.)
With ranged on Nef in p2, we just make them go slow when he's about to do Lightning Machine(electrocute), top everyone up, then push him past.
Also, be sure to have Nature resist. It's a godsend.