User blog comment:Crimson and Darkness/Shin DxD 3 discussion/@comment-79.119.70.247-20191014170553/@comment-35679297-20191015193701

Euclid with his Boosted gear replica wasn't a lot above Maou class and was probably weaker than Gressil because even he was Maou class in base form, Issei said that he was a lot weaker than his sister and his Boosted Gear replica wass much weaker than the original. For beating Gressil with CxC, Issei would need at least Crimson Blaster and more probably Longinus Smasher but as it is close quarter fight, he doesn't have the time to load his specials attacks so it is very difficult for Issei to manage.