That's pretty easy.
Luneth & Zande (EX-Burst: Crystal Sword & Meteo)
Kain & Zemus (EX-Burst: Spear Rain & Big Bang)
Aerith (perfect style of X-Death)/Zack & Genesis (EX-Burst: Great Gospel/Omnislash Version Z. & Purgatory Wave)
Seifer & Edea (EX-Burst: Finishing Blade & Ice Rage)
Vivi & Black...