The second reason was that "He" had the Life Ark that could resurrect indefinitely, so "He" didn't have to worry about the deaths of "His" soldiers.
Died on the battlefield? No problem, they could be revived through the free revival opportunity given by the Life Ark!
Dying in battle after being resurrected again? No problem. He could go to the Life Ark's Resurrection Altar and spend some Mist Core, Divine Crystals, or Faith Divine Crystals to revive them as long as there were relics!
What? Resurrecting God Spirits required Holy Spirit-Tier Faith Divine Crystals? And Holy Spirit-Tier Faith Divine Crystals were very precious and could not satisfy the resurrection needs of a large number of God Spirits?