This was discussed a long time ago, but I'll again bring up my suggestion that enemy tactics could depend on some combination of Int+Wis. E.g.,
Int+Wis < 13 - always attack nearest target
13 < Int + Wis < 23 - still prefer nearby targets, but focus on those with lighter armor, maybe ganging up on a close one within reach.
Int+Wis > 23 - "smart" enemies. Will go for backline casters, gang up on the characters with combination of low hp&low ac. Might make use of high ground & debuffing items/abilities.
It would add some variety to and different tactics for different combats.
Something like this could work but I would maybe make the total a bit lower, or just consider it by the type of enemy. Beasts should be more instinctual, most humanoids should be more tactical, etc.
