Well, I runic'ed and rasped away all his MP, so that he only could use physical attacks. But then again... you don't have rasp, which is a problem.

As far as I know, his attacks are all just completely random. I guess you could try without using runic and see whenever he use Absolute Zero or not, though. With wall-rings equiped, his other magics shouldn't be a problem. Just like Air Force, you must avoid Absolute Zero at all cost. So if it really is runic that causes him to use Absolute Zero (which I doubt, though) you better avoid using it. I'm not sure whenever he can be silenced or not.