Quote Originally Posted by Kurando View Post
For a second the I thought you were going to ask for a nerf...

If i remember correctly Diablos is using the gate to call powerful energies to destroy the warrior of light (and their alliances) so it's merely just a DPS check, albeit a weak one now with all the over gearing.
^

But to elaborate, it's a contest of strength (as Diabolos himself said) in the form of a DPS check. You're basically just trying to fire his ball of energy back him.