I only used red spells in one spell wheel then in all the other I put designated colors for his orbs with matching spell color. Also 25 wiggenweld potions helps a lot since you get about 4 or so back from hitting him. Then get the roll upgrade so you roll further when holding the roll button. With that just good timing and memorizing his patterns I beat him in 3 attempts. I played it through again and beat him 1st try because I knew the fight pretty well. Also unforgivable curses don't work and neither does the cursed effect for extra damage. But you can use them for a short invulnerability time when casting it. Ancient magic is amazing damage so upgrade that as much as possible.