Yeah, I realize that's not the weaponskill I was thinking of. It's either 200 or 175 G.Axe skill...fuck, I think it's Raging Rush. When I schooled maat on my Drk, I went in with a relatively shit gear set up. Brought a vile elixir for safety (didn't use it), an icarus wing (did use it), and I think there was some item you could use to generate tp at the start of the fight for a bit before maat assaults you. Basically, open up with 2 hour, berserk, and the other one that boosts attack power, and run normaly attacks til mighty strikes wears off, then hit him with a weaponskill, pop the wing, and follow up with skill #2. It worked swimmingly on my drk, but my 2 hour functions very differently. Still, that's why you keep the vile elixir on standby. I'm sure your brother has some better suggestions, but he's a forest rat, he's obviously out of his mind.
Quick edit: yeah, the weaponskill is raging rush that I was thinking of, skill level 200, and it's a critical mod. Scratch what I said somewhat, save your 2 hour, and when you get 100% tp, pop mighty strikes and use raging rush, use icarus wing and pop raging rush again. Not 100% sure, but it's fairly probable that maat should drop like a bitch after that.