User blog comment:B214/Shin DxD 1 discussion/@comment-36663391-20180826180128

Abut the power level of Issei: BXB= low tier ultimate class devil or above. CXC= above satan class normal standard after volume 22( with the partial dragon defication or the red wyverns could increase his power). Pseudo DXD=  lower but only slighlty to Ddraig and comparable with top 10 like Thor( figth Vidar when he used his magic boots, the artificial BXB and use the norse magic for increase the strength of his attacks) .DXD G= above normal heavenly dragon class       ( defeat Apophis that have reach that level) and could figth again Crom Cruach according with Ddraig ( According with Abion Crom Cruach have exceed Albion and Ddraig, and in terms of strength and defese is superior to DXD L) .The form of GR powers = perphaps the dragon giant form that we have see in EX, maybe with this form Issei could figth again Trihexa and Balberith. AXA= unknow perphaps Issei will reach Infinity Ophis and GR after mastered the powers of both. EXE= unknow could be result of  DXD G + GR power + 12 heavenly breast powers, his potentional probably will turn Issei into the True Oppai Dragon. Opinios about this theory?