User blog comment:B214/Shin DxD 1 discussion/@comment-30230931-20180804194539/@comment-2602:306:CD9A:C860:1D80:8C3E:6AD5:F29D-20180806013212

You say that but you haven't listed any substantial advantages that Rias team have over Issei's. Diehauser's "worthlessness" is not an ability that Rias team have so that's irrelevant.

You were right when you said power alone isn't what determines a victor but it's one the factors Issei's team has over Rias. Diehauser team beat the god teams due to his vast experience in the rating games. However Rias experience in the rating games are no higher than Ravel's. In fact Ravel use to be in the professional league with her brother and Issei has 2 more people who have more experience in the games than Rias (Grayfia and Roygun). So as far as tactics and rating games experience goes, Issei team has that edge. Speaking of which Rias has done nothing to prove she's a better tactician than Ravel.