4x Cut, your entire Hero Drink collection (I had 13 of them), Final Attack-Revive, Haste and Cure. Give all those to Cloud and eventually Ruby'll run out of MP. Oh yeah, take lots of Turbo Ethers too; by this point in the game they're everywhere.

No, seriously, I killed him using almost nothing but 4x-Cut. It was awesome.



There are some attacks it can still use but Ruby is screwed for the most part once this happens.