Party One:

Taishume Ozinkawa (FFI Fighter/Knight)
Kenjio Asuguma (FFI Thief/Ninja)
Ospura Nigachu (FFI Black Belt/Master)
Anjo Madoushi (FFI Red Mage/Red Wizard)

My characters in my Final Fantasy manga!

Party Two:

Taishume Ozinkawa (FFI Fighter/Knight)
Frionel (W/ Masamune)
Jeff (FFIII First Ninja w/ Shurikens and Excalibur)
Cecil Harvey (Paladin)

Party Three:

Butz (Traveler)
Sephiroth (w/ Masamune)
Taishume Ozinkawa (FFI Fighter/Knight)
Cloud Strife (w/ Ultima Weapon)

Party Four:

Taishume Ozinkawa (FFI Fighter/Knight)
Cloud Strife (w/ Ultima Weapon)
Tidus (w/ Caladbolg)
Sephiroth (w/ Masamune)

or take out any one person in Party Four and replace them with Maester Seymour to form Party Five.
For best effect use higher classes for all in Party One and for Taishume Ozinkawa (FFI Fighter/Knight) in the rest of the parties, use Safer Sephiroth in Party Three and Party Four, and use Seymour Omnis in Party Five.