When you're facing one enemy (or one party of enemies) there's a standard trick for going toe-to-toe with many of them while avoiding most of their attacks. It's the two-step cheese, which many are probably familiar with. You attack, sidestep, wait for the monster to move. The monster will first turn, then move to be adjacent to either one side or the other, so that when you turn to face it, and find a monster staring sideward. You take a free slash or two, then when the monster turns to face you, sidestep again before it can attack, etc...
Wouldn't it be interesting if a map designer had an option to enable certain monsters to "out-smart" this cheese? Perhaps by instantly facing the player when it moves.
Along those lines, could some monsters be made resistant/immune to freeze life?
While we're at it, what if we could have certain monsters go up stairs.... hmm never mind, better not go there
