I think that you need to remove the killer.Save() after every kill. True it saves you from the server doing a rollback, but just do a main daily. If 30 archers are hunting monsters, each of them will kill 20,000-50,000 monsters(at least) in an hour, that is 3,500,000 saves. Also I think on every big scatter, he is going to spike a bit. I have tried this on a Redux code a few months back, if you save that many times that fast, the killer will lag as hell.