Cirque du Croix

Cirque du croix is the jewel of La Croix's undead creation, consisting of seven zombified queen-level monsters: Battle Overview:
 * Fernandez, a well-known cursed swordswoman of elf origin. She deals maximum damage with her dagger. Also, she was the creator of Bloody Fissure Thunder Thrust.
 * Former Queen Harpy, a cunning and warlike leader who once brought Ilias Continent into unrest and almost led to her species' extinction.
 * Titania, a mutated fairy who possesses weather and climate controlling abilities.
 * Former Queen Skylla, a very strong monster due to her very ancient bloodline.
 * Pirate Queen Rosa, a mermaid leader once led a legendary pirate group and raided the seven seas.
 * Former Queen Lamia, nicknamed "the Holy Snake of Benevolence" as she brought peace to her once divided species.
 * A strong being that surpasses the above creations and the pinnacle of La Croix's creation. (Not listed for spoiler reason)

The first round with Fernandez and the Former Queen Harpy requires you to summon Sylph for Fallen Angel Dance. It avoids the Queen Harpy's OHKO bind move.

For the second round, Summon either Gnome or Undine. Undine to raise your evasion rate, or Gnome to increase your defense and escape the Former Queen Skylla's bind quicker.

For the third round, summon Gnome. The Former Queen Lamia has a strong bind move which will K.O you if you don't escape after the first turn. Don't forget to heal when necessary.