So I have been going back to complete some of the achievements they added. One is a raid kill for Culthor the Gatekeeper in Caverns of Exile off SolB. I went in farmed up the 4 proper turn ins, turned them into the Firewatcher with a Warrior level 71... he returned them said he didn't want them and the boss did not spawn. So then I logged in a Rogue did the same thing and still he returned them and didn't spawn the boss. Am I doing something wrong? Is the boss only spawn-able by a Rogue? Is it only spawn-able by a rogue on that exact step? And finally why is it a raid achievement when its a 1.5 Epic step that can only be spawned with very narrow and prohibitive condition? I have not seen any other 1.5 bosses listed as raid achievements.