Hi guys, here is a hind: i will tell u how to kill Doctor Herregods with an asassin...ok firs...to do this easier u have to be lvl 25+....then, get the skill Subversion, ok.... the doctor has 1 million hp and he heals himself with 2 million hp when he has less than 989999...ok...attack him with ur skills and keep going, be sure that u have Blood Focus cuz u will need focus...ok, when he has like 990100 attack him with Break and u will stun him and hurt him, so he will have like 989890 and ur friends will attack him too...so he wont heal himself cuz he is stuned...in the next turn he will pass, and then u will attack him with Subversion, he will try to heal himselft cuz hes low than 989999...ok...subversion will switch damage with heal and heal with damage..now u understand? he will attack himself with 2 million hp :D...i hope this will help u..good luck ^^...