I finally beat her! All I did was build up till I got Holy, gave Yuna "deathproof" and "zombieproof." Used less than 5 ethers, 1 megapheonix, 2 pheonix downs, Bahmut i made a boo boo and used too early so didn't really even use him! It was great. Took less than 10 minutes, when getting stomped by Yunalesca took over 30 min!! YAY FOR ME THANKS FOR THE ADVICE ALL