Saleen had little concern about the expedition because he had a level 13 being at his side, Rafel the archangel, who was very interested in the expedition. Unless Saleen was again trapped in a sealed off place all on his own, he would not be in any danger if he were to run into difficult enemies.
The Floating City did not travel quickly. It was used to train the troops while they were flying, allowing them to learn aerial combat.
With not much to do, Rafel sought out Saleen.
"My lord, you're one of the more powerful mages on this plane, and the plane's power is gradually rising," Rafel said "If you were to keep your hands away from all these matters and dedicate yourself to your training, you would quickly advance, just like how your teacher did. You be able to maintain your edge in terms of levels. Why take the risk to fight the creatures of alien planes?"
"Why would you protect the metal angels, Rafel?" Saleen asked.