Cure Method - engage Maat and heal yourself until the end statement.
Key to cure method would be to never use more than cure 3. This limits mp usage.
Also, once you have healed yourself for 5,000 HP - meaning you've taken ~5,000 points of damage, you win the fight. I've done the fight 3 times and by this method he ALWAYS gave up and said I won as soon as I cured myself into the 5k range. The source of the cures is irrelevant: Benediction, Cure 1~4, potions, gear, etc...
Repose Method - engage Maat, repose him until end statment.
Key to Repose method would be having a Divine Magic Skill above 220.