get the berserker dressphere obtained in chapt. 3 learn howl and hurt and get the key to sucess give it to 1 of the characters i would give it to yuna .have yuna and rikku as berserker and paine as alchemist dresspere found in chapt.3 i think or you can get it in chapt. 5 it is located in the calm lands there will be a little side entrance if you start going near mt. gazat any way use the ability hurt on mindy the little bee take her out first and keep on using hurt and with the alchemist learn mega potion and keep on using it through the whole fight iknow i beat the game 4 times