Right from the bat, you want a party of Wakka, Rikku, and Auron. Have Wakka and Auron attack while Rikku should tell Cid to move back. When the ship moves back, you’ll be out of Evrae’s range, but Wakka should still have him in his range, and Lulu as well with her magic so bring her in instead of Auron. Wakka should attack while Lulu casts her strongest level spell. Every turn of Cid’s, he’ll launch a wave of missiles at Evrae whic will help you out alot. Now, you’ll have to use Rikku to supply a good defense on your team. Use a Chocobo Wing to caste Hastega, or use Chocobo Feathers on each individual person (starting with Rikku). Use Light and Lunar Curtains on each person as well. If you get Rikku’s OD before the fight, have her mix a Super Mighty G which speeds up the defensive process. You could consider using Stamina Tonics on everyone, espeically those with low HP (*cough*Lulu*cough*) to double their max HP.
So keep attacking with Wakka, and magicing (?) with Lulu and have Rikku on stanby to give Al Bhed Potions whenever needed. When Evrae loses most of his HP, he’ll come flying over to you to initiate close range fighting. You shouldn’t pull back cause he’ll just fly back. Swap Lulu with Auron and have Rikku Haste him. Then just keep attackign with everyone and use Rikku to use Al Bhed Potions whenever needed.
Just for later on you’ll have to fight Evrae again, but this time the fight should take like 1 turn. Evrae is zombified during this, so just cast life on it. Thar you go dead…..that’ll be the last time you have to fight Evrae.
Hastaga, Hit, Hit, Hit- Win
Oh and when it goes "grrr" go back..
KICK HIS FLYING ASSSSSSS!!!
then when you see him again kill him with 2 phoenix downs