If I had ever been in Khaldun before, it was a long, long time ago. After a couple hours of play, I finally figured out that I wasn't damaging a lot of the spawn with the Mystic/Mage spells I was using. I saw that the blue skeletons went down to fire, the red ones to cold spells, and the grey ones to electric spells, but what spells damage the purple skeletons and those black fiend things?