User blog comment:B214/Question and Answers 3/@comment-24098614-20140726045053/@comment-1359322-20140727231956

Hmm actually i think its safe to say that Diehauser is Maou-class in strength. Diehauser and his team was actually able to stall the Jabberwocky, something only about Sirzechs' team can do. So we can assume that Diehauser is of Maou-class strength while his servants are around Ultimate-class strength.