User blog comment:B214/Question and Answers 2/@comment-37.231.32.124-20140330203936/@comment-24468758-20140330213515

In terms of power Issei is without a doubt the strongest of the Gremory group with Rias overpowering his attack power with her finishing move. In terms of battle strength Kiba would be somewhere near Issei might even a bit higher because he is a technique type.