You know the type of mobs that have huge amount of hps and do great dmg. The some that come to mind from live would be korroduth the little turtle in OOT when doing lodi, the camp of 4 nobles by the hopper caves in dreadlands, Or the guys in tipt who dont summon forget there names. Owlbear in paludal caverns. Something along those lines. As reverse charming here doesnt go so well with the penalty assist so I try to keep one pet buffed and healed at all times. Oh another undercon would be on the moon where you can charm the sentry guard and then just wipe underbulks and even the names and the snake.