One major issue I see is that the AI automatically knows who's the weakest and tunnels them until they're dead. Even trying to kill them while they're downed ignoring other players completely. So generally playing any mage class like a wizard puts an immediate target on your back right when the battle starts. I'm not certain if this can be helped but maybe have the AI make a check to see who's the weakest like in actual tabletop dnd 5e.