*Sigh*, well, first off, there are many threads like this, but in case you want to know, it's simple. Bring his focus down to zero using abilities like regulate, haunt, and disrupt. When he is out of focus, he will use a skill called dark burning, in which every turn he will heal himself for 100 focus at the cost of a LOT of health lost per turn, so you just keep doing that until he dies.
ANd eh, you shouldn't ever run out of focus, as a psycho, use free will and use dark infusion on yourself if you ever run out of focus.
get a spell that regenerates focus. then hit him with everything you got. make sure veradux is on phalanx so he heals you. when he runs out of focus, he gets deep burning, which hurts him for about 4500 each round for 3 rounds. after about two of those, he should get holy scars which does anywhere from 2 to 19k damage to him. after he is down to about 31000 he basically kills himself
Gah, regulate is for hydro, and disrupt is for bio. THere should be haunt as well as another one called traumatize. Use both of them in tendem and taking him down shouldn't be that hard, traumatize also stuns him, so that's another plus.
This is easiest on the bio class btw, his disrupt when maxed (two points) takes away 100 focus.
Use Haunt and Traumatize, when he runs out of focus and starts doing damage to himself, use Implosion. When he casts holy scars use Shock Therapy. Use electrical storm to regain focus.