HAVE YOU TRIED EQUIPING "LADY LUCK" AND USING GAMBLE, RANDOM WHEELS. WHEN USING THIS HIT THE START BUTTON ON AND OFF TO PAUSE AND UNPAUSE UNTIL YOU HAVE A RED 7 ON TOP LINE AND PRESS X (THERE ARE TO RED 7s USE THE ONE WITH A CHERRY ABOVE IT, THE OTHER WILL GIVE YOU IN THE END 3 BARS WHICH CAN INFLICT DAMAGE) A BIT OF PRACTICE MAY BE NEEDED, THE IDEA IS TO GET 3 SEVENS IN A STRAIGHT LINE AND THIS GIVES YOU CONGRATS, LOADS OF GIL AND VERY GOOD ITEMS. THIS WILL WORK ON ALMOST ANY ENEMY.
EXTRA....AFTER YUNA HAS DONE HER SONG ON THE THUNDER PLAINS AND YOU ENTER THE DUNGEON AGAIN USE CONGRATS ON GIGAS AND GET CHAMPION BELT (DEFENCE AND ATTACK +40), WHEN GIGAS IS A OVERSOUL YOU GET KAISER KNUCKLES (ATTACK +50). I STAYED IN THERE FOR OVER 6 HOURS GOT MY GIRLS UP TO LEVEL 99 AND OVER 4MILL GIL.
HOPE THIS HELPS.