>>542199920
Eileen has dozens of allies, Yesod wanted his allies to die to become immortal and omnipotent
Eileen also runs Smoke, the best damage status in the game, while Yesod had and still has a lot of damage modifiers that made up for the missing 50% increase and let him kill her entire team at once to avoid dealing with chained mass attacks
His abnos were then changed right before release