Yeah, I was nervous going through the fog for the first time… I ran right up to him, casted one firestorm and it was done. I think that the admins should change the Dirty Colossus magic stratigie to:
With Firestorm set and ready to go, put on the Yellow monk robe on your head. After you've done that, ignore anything he does to you and just run up. cast it and gather his soul. Easy as pie. :p