User blog comment:Piyush Banerjee/Shin DxD 2 discussion/@comment-2602:306:CD9A:C860:A9B0:D607:7141:9234-20190706015400/@comment-28884330-20190706093459

Vali only surpasses Issei in speed and technique. He definitely is not outlasting Issei’s 88 minutes. And even if he could, it would not be relevant, because a battle is not lasting 88 minutes. How would magic counter Dragon Slayers? That’s as vague and meaningless as saying “Issei has the power of infinity to counter any advantage Vali has”. Vali’s magic has been consistently shown to be mostly offensive in nature, and that wouldn’t counter Dragon Slayers at all. Vali has shown so little variety in his magic usage that one could even say Issei’s plain blasts cover that, as all Vali has used is blasts.