He uses Meteor, Amped Strike, Promethean Fire, and Deus Ex.
His weakness is that if he has 100 of the type of attack he increases at the time, he uses Conjure. If one has a Pirate with Skull Bash and Defang or White Mage (or Red Mage) with Dispel, then he can be easily defeated. It is also a good idea to have at least one Salve-Maker to compound Reincarnate (Ether + Phoenix Down) because Amped Strike at 150% physical attack can one hit KO.
With more than 100000 health, he uses Promethean Fire, with less than 50000 health he uses Deus Ex.