This has nothing to do with mods - I had the Red Prince acting as an archer in one of my play throughs and he literally would die in almost every encounter because the AI focused him. Is there a stat somewhere that enemy aggro is taken from? Current play through, my fighter character almost takes no hits because the AI is too busy attacking our mage and rogue characters instead. I know there is a taunt in the game, but the fact that you have to remove armor before you use it kind of makes it useless for a group of higher level enemies.