User blog comment:B214/Question and Answers 6/@comment-185.112.105.215-20161222192309/@comment-26821288-20161222210834

He is in the Top 10 Strongest beings in the universe of DxD, but Dragons are really strong on themselves. I don't think he'll be able to surpass combined power of all the Dragon Kings, especially if you also count Tannin. But either way, I don't think he is stronger than all of the Dragon Kings combined, including and excluding Tannin. Though, again, it's pretty much my opinion.