Hurt yevon Priests. Heal Lulu.
Tidus 300
Yuna 330
Auron 330
Wakka 330
Lulu 330
Kimahri 300
Rikku 300
Seymour 270
Jecht 300
Dona 300
Rin 300
Issaru 300
Pacce 300
Maroda 300
Lucil 300
Elma 300
Clasko 270
Al bhed race 300
Yevon priest 240
Yuvon Nun 300
Maechen 300
Belgemine 300

I suggest that no more characters are added, because they would have an unfair advantage if they're introduced when half of the characters have 100 or so HP left