Skill set!!!
>Yuela with God Slayer Armor for Flurry III skill(chance to attack twice)
*Prevail III
*Undress III
*Vorpal Counter III
*Ferocity III (change this to Soul Shield III/Magic Resist III once her HP is below 50%)
>Serawi with Elf Princess Tunic for Elemental skill (gives "blessing" on any terrain, and never suffer from any map HP/SP/FS drain)
*Prevail III
*Undress III
*Seal (change to Counter III if on melee mode)
*situational skill slot, select from the FF.:
-->A. Flurry III
-->B. Enhanced Battery
-->C. Ball Slam (turn her to melee mode, sounds stupid but trust me on this one)
>Emelita with Little Devil Robe
*Prevail III
*Undress III
*Flash Step III (change this to Soul Shield III/Magic Resist III once her HP is below 50%)
*Sonic Scream (change to any elemental magic you want)
TIPS on those level 90+ maps:
1. Take advantage of the Save/Load function...
2. Finish the Valkyrie Falls>Land of Regrets map (Kohakuren must be recruited to enter this map) FIRST, it will unlock the "Desperate Bracelet" recipe, an accessory that grants Prevail III skill...
3. Recruit them:
-->A. Mylen Ploa
-->B. Eushully
-->C. Ms.Eukleia
-->D. Asmodeus
-->E. Golem, Lily, Leguna (finish the *Extra Stories>Hot Spring Tales to unlock them)
4. Characters must have Prevail skill, and should only be healed/use potions when needed and don't exceed 40-50% HP, the lower remaining HP they have, the better!!!
5. Useless characters on level 90 Maps, don't even bother using them on those maps:
-->A. Emelita (only useless on Mirage Forest>Burning Sands map)
-->B. Suina
-->C. Crayl
-->D. Melodiana (one with the lowest Spd stat, always gets attacked 3 times in one battle)
-->E. Uya (he may have high Evd stat, but once the enemy hits, it's most likely a 1-hit-KO)
6. Use those elemental resist necklaces (Sanctified Necklace, Typhoon Necklace, Etc...) when needed...
7. Using potions is not shameful, they are part of the game...
8. I recommend having your characters at level 85+ (or level 99) if you plan to enter those level 90 maps...