I only did Maat fight on WHM, which is apparently just "heal yourself for x amount of HP and the fight ends" -- something like that. I used Benediction too early on my first try, got it the second time.
I had SMN leveled, but I don't think I ever bothered to run the Maat fight, even though I kept a SMN testimony in storage.
When I come back for Aldouin, I'll have to do that for kicks and grins.