User blog comment:B214/Question and Answers 6/@comment-39829421-20190616140318/@comment-10330822-20190619012817

Issei's strength right now is Top 10, the question is where does he fit in the list. The problem is besides Trihexa, Great Red, Ophis, and Shiva; the rest of the order of the Top 10 is up for debate. But its safe to say Vidar was Top 10-Level when he fought Issei.