Quote Originally Posted by Dausuul View Post
Not at all. Demons, for instance, are immune to poison. Lock up a demon in the forcecage, and you end up with a demon sitting in a box getting madder and madder for roughly 40 hours.

There isn't really a single "win button" tactic to beat all opponents. However, there is usually a "win button" tactic versus any specific opponent, and the great advantage of wizards is that they can almost always come up with some way to apply it.
Can't demons teleport at will? But you are right, there isn't a single win button against everything. The problem is there is a win button for anything, and a wizard has access to it nine times out of ten.