The Fiery Lords of Sethria's RoostThe elites on this quest are taggable. This is unlike the other mobs in the area. That means you must be in a actual party in order for everyone to get credit.
As long as people are correcting info and or providing new information. You don't need to do the shadow wardens in order to do king of the King of the Spider-Hill The hill and the spiders are on the hill already.