User blog comment:Fullmetal Renkinjutsushi/Exactly how strong is the Demon Lord ?/@comment-32598341-20200201173021/@comment-10330822-20200205021830

You could ask the Demon God the same question, how did he just "steal" the Divine Sword from Satou when he had it? He's the Thief God, and his servant, Goblin Demon Lord did the same thing, and they still haven't explained that.

I wouldn't be so sure about that. The Anti-God Magic is far more dangerous than it appears given that they have weapons and tools to increase its efficiency, and even Arisa can one-shot a Apostle with it at Level 70. So items and tools can make up for the level difference. Besides, the unique skills aren't as dangerous as you seem to think they are as the Goblin Demon Lord had them as well.

I think the point here is that the girls will probably be used as a means of letting all their efforts shine, since for the most part, Satou has been far too strong for them to be critical.