I coded a strategy game in Game Maker where the hero was not trying to beat the demon but just escape its keep. The demon made decisions based on the hero's condition (Health, Stamina, Defenses, Attacks, and Will Power.) So yes I guess I do use AI.
As a side note I have in in my plans to rewrite the game in Construct to see the how well it converts. It might be interesting to see how Construct adapts to such a code heavy game. I am expecting well since I can now use the power of objects. If Will Power is lower than Defense use mind attack.
In fact I want to convert a lot of my GM game to construct to compare.
The tough decision will be do I want to pay the $25 to upgrade to GM8 for a better idea of how they match up and which program is better for what purpose.