In EE, I think you can choose in the bonuses before the start of the map what the AI will be like (defensive or aggressive).

But I completely disagree with this – an unpredictable enemy is, in my opinion, better than one that is pre-programmed to a specific behavior pattern.
In general, if you look at the original ToE, sometimes it happened that after defeating a strong neutral creature guarding some relic, the AI, instead of taking the prize, would pick up a bunch of resources or a chest, which clearly only supplemented the main treasure – that is, it gives the impression that this battle was only for gaining experience, because why defeat a strong neutral creature without taking what it was guarding? Such stupid actions by the AI generally baffle me.
Another well-known problem with the AI is its attitude towards the "Evasion" spell and mass versions of spells. If the AI is so dumb and this is irreparable, then you could try to program specific perks for it that it will/will not take, because there are clearly strong and weak perks, and even with strong perks, the AI sometimes doesn't know how to use them. In my opinion, only passive abilities will be played out in a game with the AI (that is, the development of combat skills, machinery, and logistics), and from magic, perhaps only chaos or darkness, and even then not always – these are not passive abilities, and the AI may start to act stupidly