Unsure how much this will help, but I imagine one could get the basic strategy that a BST uses for GK5
Items Needed: Hi-potions, Pamama/Persikos Au Lait, Def OR Attk food (up to you), Icarus wing (just in case), Opo-opo necklace, 4x Sleeping potions, PanzerGalahad jugs (2 at most per attempt) (aka. Scarlet Sap), Pet Food (I reccomend Zeta).
Main strategy, involves Panzer Galahad doing all of the tanking and damage dealing to Maat (for the most part).
Enter BC, call beast, equip opo-opo and start sleeping. Get up to 100% TP (4 pots) and then pop your au lait, food and reequip your normal neck piece.
Enter arena, you can run up as close to Maat as you want. Send pet after Maat and then wack his pet. Pull the pet out of the main circular arena, away from Maat. Rampage it and it should die from the rampage (they have roughly 350-400HP) or from the hit soon after it.
Heal up using hi-potions. Make sure that you aren't in range to get hate from Maat. The key here is to let PanzerGalahad do all of the damage to Maat, and take all of the damage from Maat.
Run back into the fight area and equip your BST AF Body + Boots and reward your pet. It's best to use Zeta because that gives the most HP/Feeding, and there's really only time for one reward.
Go engage Maat and attack him. When he calls his second pet, switch targets and do what you did for the last pet. Use Icarus wing if you have to, but hopefully it will have been a weaker pet and you can take it out easily. Remember to Hi-potion up after killing the second pet.
Your PanzerGalahad should be close to dying and you should have close to 100, if not 100% TP. There's two things you can do here:
A) WS Maat, and then Icarus and WS him again. Hopefully Panzer will take some hits while you do this and he won't die; just as much, hope you don't die ;). You have to get him to 20% or below and then he gives up.
B) Wait for Maat to finish off your pet, and by that time he should have called his next one. Run away from the arena and call your next PanzerGalahad and send it after Maat. Let his pet come after you. Rampage Maat's pet and by the time it's dead you should have won the fight. Otherwise, just sit back and let your juggy do all the work.
Congratulations! You should now have beaten Maat ;)
Now, for the main purpose of this post: my video :>
Please forgive the poor quality, it's my first time editing not with Final Cut >_>Shattering Stars (BST)
*edit*If it says you don't have the proper codec, forgive me. Here is the url:3ivx Direct Download