From a Mage point of view: I still get killed sometimes when i enter the crespo A dungeon. i think its because of the monster lvl, or the monster amount that you have vac'd to you. it only makes sense that the game has trouble controlling the AI's of all the monsters at once? other than that there must be some values as LiqFizzle said that control what the monsters do. I even freeze the monsters all at once with a skill and then once theyre unfrozen....i die xD.