To expose the Omega followers, he had no choice but to send these people to their deaths.
If he couldn't root them out, he would simply kill them all.
Once the ordeal concluded, the Celestial Being Organization would naturally bring the corpses of these Celestial Beings to him, requesting resurrection. At that point, he could demand outrageous benefits in return.
Regrettably, the training of the Divine Ashes Technique became increasingly slow as it approached the bottleneck, especially the final Solar Stripe, which required an astonishing number of Divine Powers transformed through the Fate Principle.
Such immense Experience Points still failed to fully illuminate that Solar Stripe.