User blog comment:B214/General Discussion/@comment-30924344-20170910010908

From n0m@n from animesuki:

"Hmm. So there was monologue of Ise in this volume when he was mentioning about God-classes. So the non-deity people who he mentioned as having a power of God-classes were Crom Cruach and Vali.

Anyhow, for Ise's current strength, people refers to him and Bina (Grayfia) as above Maou-class. Ise still has a incomplete DxD in this volume so I guess he's still not in a God-class zone yet because of it. In this series, when people refers to Maou-class powers they are using the original(previous) generations of Maou and the current 4 Maous are all above that power-level so its not surprising Grayfia is above Maou-class too (since it was mentioned she was like Serafall's rival where they once fought each other for Leviathan's position)".