11:37am, 11/14/18.... I have spent 1 or 2 hours a day since this post trying to spawn Xorbb.. Today at that time stamp, I successfully spawned him!! First time spawn, and he dropped the staff!! Can officially confirm- He spawns. Working on getting the 3 other staffs in case anybody is interested in completing the Blue-Two Handed Hammer Quest. Look no further than me!!!
https://wiki.project1999.com/The_Visiting_Priestess
https://wiki.project1999.com/Blued_Two-Handed_Hammer