After the Risen Lord's defeat, Enfield Academy was quickly taken, and the galaxy's inscription reactivated. But even after they managed to reclaim the third galaxy, everyone's work didn't stop.
The Celestial Shadow had already shown it could move its will through the Risen, and that was what destroyed the Academy before. Darian couldn't feel even a bit of safety while any Risen still existed inside the galaxy. So, with the inscription activated and everyone trapped inside, with no chance of calling for reinforcements, they started clearing everything as fast as they could.
Unfortunately, Darian couldn't waste time or risk the enemy doing something, even if he thought it was unlikely.
So he divided the entire army in the most efficient way possible, and they started attacking the planets. Darian and Niara took the higher-level planets, which weren't even 0.01% of all planets.
