A good necro will utilize lulls and invulnerability to break and pull to camp.
FW should be a SoW'able zone as it is outdoors. Restricting SoW for the sake of testing is one thing, but consistency is important. Not having sow in there limits a camps' pull radius and mob density is still very high, thus limiting actual camps.
Try pulling High Priest to upper Armory (only somewhat safe area nearby).. there's 40 mobs in the way, essentially ensuring a crawl. /shrug