I don´t think it´s the best idea to give the 3rd key of the evil shadow to the peeps doing most damage. Getting lootingrights should be enough. At least this way, some people can satisfy their greed, without stressing people that don´t stand a chance against them when it comes to damage output. It really sucks if you are in this room for some hours and waste your time without getting the last key. Or at least make this beast a lot harder, so it doesn´t die within 5 seconds when 5 evs are bashing on it.