Might not be my place to say anything but I'll just leave some input anyways. I used the 0.2 hack and all my characters are 25 and have remained at 25 over a few days. So personally I would just say use that for leveling and release this hack for now until that stops working. And based on what I read when downloading it, 0.2 worked even better than it should've, since my levels actually saved.