You clever clever men (I'm assuming you're all men please correct me if I'm wrong)

I've never been able to do this but I have seen an American dude on youtube beat Ruby Weapon with Lucky Sevens and Omnislash combined. He got Cloud to 7677 then made him go "apes**t" by giving him a potion and also using Omnislash. Both of these are like some holy grail to me but....I was just curious...I'm not a rabid completionist
:-P