Starts the fight with 5 Dark lancers with -10% resistance to Light, close to the starting party location. Once all of the lancers are defeated, 2 rangers will show up on each side of the staircase with varying elements, and 1 Dragoon in the middle of the second floor.
It's recommended to bring some Pierce resistance since there's 5 enemies in total with spears. Missile resistance can help against the second wave, but you can burst them down pretty quickly if you're prepared and close to them when they show up.