Mmmmm, copypasta.
Please do NOT +rep this guy. He copy and pastes everything. He has 4-5 threads that he copied and pasted. BAN HIM!
heals come from his poison killing adds, afaik
Confirmed it has been fixed.
The reason he heals is an AoE poison he casts that heals him for 10% of his health when something dies, also the adds have a disease that cause 100% more damage or something like that.
I am guessing you got lucky and he didn't spray poison fast enough and your warrior owned him with the disease debuff on hadranox.
"keep in mind the adds can cast this debuff on hadranox or the group, and the aoe poison affects everyone aswell"