I can't tell you for sure yet how his spawn works yet, but I do know for sure it doesn't have a single thing to do with 11 AM game time. I went to camp him at the very back room in the creator camp and got him 3 times over like 7 hours. I thought he would spawn from the 2 mobs near that camp or the 4 mobs up on the floating island, that was wrong as well. He spawned every time in the middle of the creator where no mob spawns at all. It appears he is on a timer but I'm not sure how long. I got him about every 2 hours in that spot. One at 7 AM game time, one at like 3 PM game time, and another at like 8 AM or something. Not a single time did he or anything pop in spot at 11 AM game time, ever... So I know that's a load of crap. My guess is their are 3 spots he can pop in, once every hour or 2. Maybe I just got lucky getting him in the same spot at what seemed to be almost 2 hours on the dot, but who knows. So while he does not work like normal named, you can indeed still "camp" him. It's just timed instead of random luck. He dropped the mantle 3 times in a row which sucked as I was after the Knight 2her. I'll try again soon and see what else I can figure out