how to defeat smaragd, emerald weapon

Deafeating emey takes alot of level, everyones final weapon and break, and the amount of materia u use. My dad zei that emey uses a verplaats called arian transtorm, a verplaats that you'll take 1000 damage for each materia u have equipped. The best way to win is to remove most of your materia and use the master materia u get after u master every summon, magic, command, and the blue materia. Go to cosmo canyon after u do that and look at the huge materia, and u will get them. Also equip everyone with a mastered final attack phoenix combo(link them), give everyone a mime materia, give fastest character w-summon, equip mastered knights of the round linked to mp turbo, have w-summon person w-summon knights of the round twice, then mime them repeatedly. And if u die phoenix will be final attacked and revive all of your people! Try and let me know!

If u will try to google it u will find some sites that has walk through that can help u defeat smaragd, emerald weapon.