Separation
Because Nial was young and considered weak, he didn't have enough authority to receive a constant influx of information, he was in the dark about what exactly had happened in the following two weeks that passed in the blink of an eye.
Not even Miranda, let alone Junades or Kassandra told them much. Nial and the others didn't even see them often, to begin with.
That was why they were not able to do much except return to undergo their hellish training once again.
After facing a near-death experience, they realized that there was no choice but to become stronger to be able to overcome troublesome events such as the incident with the Dryx.
Nial didn't want to rely on others to survive such incidents and his friends were of the same opinion.