This trick requires at least four Mega-Ethers and nine Fire/Ice spells. This is how you will construct the deck (in order):

Fire/Blizzard (x9) - Firaga/Blizzaga (x3)
Mega-Ether (x4)
Cure (x3 or more) - Curaga
0 Attack Cards (x4 or more)

Note: Vexen is weak against fire and Axel is weak against ice. Every Firaga/Blizzaga/Curaga sleight should have a value of at least 10. Also, Mega-Ethers should have a value of at least 7. Do not use premium attack cards because they are non-reloadable unless you put many of them. Set the shortcut key to the first Cure card in your deck. The theme of this deck is to break your opponent's single cards by using Firaga/Blizzaga while dealing damage to them. Use the 0 attack cards to break the sleights. Use Curaga, if needed. After using all your Fire/Blizzard cards, use a Mega-Ether to reload them while retaining lead cards. Reload your deck if you are out of 0 attack cards. For Marluxia, because he does mnot nullify any spell other than Gravity, you can use Fire/Blizzard/Thunder in building the deck. The process is still the same as in fighting Marluxia.