My bot got stuck on a rare pack with "bringer of bones" or something like that property..the rare just summons lots of skeletons ok? well the bot kept attacking and killing the skeletons without hitting the rare and the fight could last forever..so there should be a rare mob priority among minions, or at least with the "bringer of bones" property in order to avoid getting stuck, assuming Exiled-bot dont have this feature ^^.