36 might be a little low I would attempt to at least get to the 40's.
Here's what I did though.
Save, and just keep going in and fighting, even with a high level he'll be able to crush you sometimes without you being able to do anything. I beat him on my 4th try. CAST CALM right away and keep casting it other wise COMA will destroy you. because your casting CALM you'll need the heavy hitters with blaze swords to deal maximum damage since you can't rely to much on magic. Use the others to Keep Using potions to keep them alive as long as possible, makes sure you also have an item(s) to regain magic so you can keep using CALM. After that Just keep fighting and hope he doesn't get in a critical hit, eventually he'll succumb.