All of these are assumed based on characters with stats like 4500 life and 3000 attack, level 60-70 (about where they'd be with a little extra training at the end of the game), as a fighter, 240 MP as a mage.

Odine's Distortion
A creature made in an Odine experiment, as with most of his inventions it was created with genius, and had immense power. As with other of his experiments it was also a thoughtless creation.
HP: 99,999
Defense: 255
MP: 999
Evasion: 50%
Magic Defense: 255

Attacks:
Stamp (2500), Slash (1800 all), Distortion (2200, darkness, silence), Deadly Fault (MP-999, No defense), Scope (prepares Terra Redemption), Terra Redemption (4000 all, poison, paralyze 33%), Firaga (3000), Blizzaga (3000), Thundaga (3000), Flare (4400), Curaga (+9,999), Mighty Guard (protect, shell, nul-elements)

Attack Order:
First 33,333 life:
Magical fighter, uses firaga, blizzaga, thundaga
Strategy: Randomly casts between spells, if it kills a target with one spell it will use that until the first part is finished (this can be abused)
When 33,333 damage is passed it automatically counters with flare
Second 33,333 life:
Physical fighter, uses Stamp, Slash, deadly fault
Strategy: Slashes 1/3 of the time, uses deadly fault 1/3, and uses stamp the other third
When 66,666 damage is passed counters with distortion and mighty guard
Final 33,333 life
Final form, uses two firagas, thundagas or blizzagas, flare, curaga, scope and terra redemption
Strategy: Uses sweeps of aga type spells first then casts flare. After this it will cast curaga then scope then terra redemption before repeating again from curaga... nasty.