Besides, they already made an investment of divine life energy in the healing pools at the various academies for training future demorgorgs. That little investment brought about a return of 60% survivability on average. That is good enough for Legion.
The initiates left the demon prison. They all left happy. They have finally become what they trained all their lives for. They can't be sad anyway. They are alive and that's enough to be glad for. Those who failed and should be sad are already dead.
In this way, the tree father has put the giants of order to good use. The initiates are practically on par with demigods right now. It is something that runes and Stigmatas couldn't achieve. A demigod had to be the offspring of another god.