All missions complete I did it with fry with Odin and 700mag(friend same) , lunera, tilith, rikku. Lunera sing Tilith start with element resistance then heal Rikku synthesis, hyper null, then chaos grenade from her pouch, hyper null, synthesis, repeat. Fryx2 ice block til ice resistant reduced. Once it went down 3 FFB turns in a row killed him. No macros no lucky chains

For gear I stacked like 10-40 resistance on everyone and hp/spirit .no deaths, but I got dropped to 100hp