User blog comment:B214/Shin DxD 1 discussion/@comment-85.210.90.245-20180909181230/@comment-33341107-20180910192424

Ultimate pawn the chances are that Issei is going to get a power up somepoint soon since we know A×A and E×E are to come plus his queens power is to strengthen dragons. Everytime Issei gets a power up Vali does to so Vali is probably going to get stronger too. Rias at best is above maou and with proper training and when complete will probably be full on god level. So assumimg your right and Rias wins ( which seems damn near impossible to me) how would she ever be able to face Vali who will be beyond heavenly dragon level.