Hello I played many games with brettonia in campaign and I think the IA in general is very Dumb, they got massacred and they are useless, fay enchantress it's the worst, before turn 15 already dead.
I found a bug playing with damzel the hero when they cast spell take a lot of damage. I dont know why
I also believe the garrison from some races are to weak when compared to other.
Brettonia got the worst garrison in game. The high Elven garrison is weak too, i think because it all times in my game they lose for Dark Elves if you do not interfere, Alarielle is a little dumb IA too.
I realize that IA women on the good side are weak and Dumb.... Because Morathi, Isabella and Hellbron are harder in campaing