User blog comment:B214/Volume 23 discussion blog/@comment-77.188.219.183-20170424155339/@comment-78.49.82.128-20170425152530

This Volume Ajuka said, that Issei cannot use his actual DxD mode, because Orphis body was divided. She needs to resonated with Lilth, and Ise needs to unleashed GR power inside of him. When these criteria are fulfilled, he will use DxD mode without any trouble. AxA will be the part of GR power when he unleashed it. ExE is the combined power of Orphis and GR which only Ise possess it. So he will surpass Vali. They are almost equal with just Ise´s pseudo DxD mode.