I don't mean to sound backseat gaming, but a good strategy is to also go in with your limit bars filled with 7777. I did Yuffie with doom of the living and Cid with Highwind. Enter the battle and unleashed the limits as limits override turn order. Emerald only got 2 attacks in before defeated him.
Emerald Weapon's Aire Tam Storm was Deadly and There's no survive on that attack, But There's is way to Survive from Emerald Weapon's deadly attack It needs Phoenix linked with Final Attack