that is not even getting into the ridiculousness that is lone wolf + glass cannon + sneak/invis. using 2 mages with that set-up i killed the ice king and he literally never even tried to fight back. he is supposed to be one of the harder bosses in the game and he just stood there and took it because i ended every turn with invisibility. if you use environmental effects on any melee type enemy they will never cross over them either, they will just stand there and let you kill them... the enemy AI is just really bad.
I am not sure if that is a good example, I mean, sure he is one of the few bosses in the game that my 2-hand warriors did not kill in a single turn, a single flurry just removed about 1/3 of his HP ;-)
At the same time my mages did heal him with their spells because of high resistances. I would have liked to focus with them adds, but a single whirlwind killed to first spawn of ice elementals in one blow.