User blog comment:B214/Shin DxD 1 discussion/@comment-95.210.189.106-20180809123512/@comment-2607:FB90:920:3CFB:0:35:65CB:A801-20180811180522

Issei might need True DxD G when he face Crom. His Psuedo is weaker than Vali DxD L and Vali would've likely lost to Crom if they kept going. Although Crom says there isn't much of a difference but Vali would've surely lost if Crom fought in his true form. I get the feeling Issei will be fighting Crom's true form. Those dragom slayers alone won't be enough against Crom.