Cloud's Level 4 Limit Break Omnislash Is The Strongest Limit Break in The Game

To get Cloud's Ultima Weapon keep on beating weapon until he crashes somewhere and is permanently defeated. Then go to the place he crashes and get Cloud's Ultima Weapon!

To get the best move omnislash, go to gold saucer and win the battle arena with i think 34,000 battle points! Then, exchange them for Omnishlash.