Since this quest is much easier compared to the other Sorrow's Furnace quests, most of the players in the Deldrimor War Camp have already completed this quest. This can make it hard to find a party of humans, so feel free to take Henchmen and Heroes instead. Two healers and two warriors should be enough, but it depends on your class, also. The only real problem is that toward the end, Kilroy will aggro several groups at once by running through them to the next one, and if you don't stay with him, and keep him healthy, he will die and the Quest will end.