I would stay far off of his radar, Ariel, if I were you. I know you're aware of how mad he is, but compound that with the fact that your ascension was the signal to his end, that your death was the impetus which made became fully demonic... He may wind up having undue amounts of rage stored up with your name on it.
And heaven only knows what new powers have been bestowed upon him in his new position, if any at all.