Aaron and Aerith flew fast and strong leaving the place, Aaron still remembered very well the location of the floor boss room. That made it easier for him to get there quickly.
According to the clones' exploration, Aaron had to pass through at least a few intersections in several maze hallways to get to the front of the floor boss room.
Aerith followed wherever Aaron was going, because after all, only Aaron knew the exact location of the floor boss room.
After turning at several intersections, Aaron finally saw the location of the floor boss room. Just like before, a mage was required to register when challenging the floor boss.
Both arrived and landed right in front of the floor boss's door. There was no one there, not even Aaron, the only one on a raid on Dark Pillar 81st.
"If you manage to defeat the floor boss, you will go up to the 82nd floor," explained Aerith.