Defeat Angry Mainyu
Before proceeding save your game.Next,make sure you have 99 potions and Hi-potions.Have all 3 characters up to level 80 at least.Equip one person as a Alchemist,another as a Berserker, and another as a Dark Knight.It dosen't matter which garment grid you use as long as it boosts speed.For accesories,have Yuna,Rikku,or Paine with ribbons and accesories that raise HP.When you go to battle it,have the Alchemist mix a star,light or lunar curtain to make a "wall" or
"mighty guard".For the rest of the battle have the Alchemist mix a potion and Hi-potion to get a mega-potion to use every time.Tha Dark Knight should always use "Darkness" every time.And for the Berserker, attack Angry Mainyu every time.Don't worry about the fiends one the side,the dark knight takes care of them.
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