User blog comment:Crimson and Darkness/Volume 25 discussion blog/@comment-32252462-20180321143728/@comment-24595619-20180321164316

There has been Technique-Type in the story has proven that there are ways to beat Issei and catch him off guard without having overwhelming power, which has been proven multiple times to not be that hard a thing to do. Besides, it's not impossible to beat him.