#1-make macros and test them before fighting Maat :)

No sleeping TP 
Carbonera + au lait to top off HP
dodge headband (equip AF once you use headband)

boost 7-8 times, engage out of melee range, use (in this order) Dodge, Focus, 100Fists, Chi Blast (swap in promise badge for Chi Blast, then back to Spike Necklace) 

Take your time wearing him down naturally until hes at the halfway point when he will eventually 2hr.

When he uses 2hr, finally do your WS (raging fists is what i used) (you should have 150-250% tp naturally gained from a long fight)

I was trying to use icarus wing (which i'd conveniently left in Mog House...oops) when Maat gave up a few hits after my Raging Fists.  I think I used Chakra at some point.

Bring an icarus wing and vile elixer/vile elixer+1 for insurance...it seems like a LOT of this fight depends on luck.

good luck :D