It seems that some people are asking for AI that "adapts" to the players that are fighting it. I'd just like to point out that this wouldn't work based on the idea that if a hardcore group noticed this they could act in a certain way in the early phases of the fight to make the later phases a joke, or if it was based on how long you were in the fight and previous wipes act deliberately to trick the AI into giving easy wins. Sure casual players would still face a challenge appropriate to them but the really hardcore would find ways to make every fight a joke that wasn't even remotely as challenging as it should be for them.