Claws in the ground = revive party
Claws not in ground = everyone ko'ed but one!!
That will help avoid his quicksand attack.

Put on KOTR linked with hp absorb.
Have hades, mime and a w-summon on and put any extra materia you want on also. Start the battle with 2 mates ko'ed. Then wait til he puts his claws in the ground. You can now revive your party if you want but your gonna have to risk losing one or two if he takes his claws up. Cast hades KOTR by using that w-summon, then mime. Good Luck!!!