User blog comment:B214/Volume 23 discussion blog/@comment-76.175.162.45-20170402043409/@comment-29963364-20170402051533

@Ultimat Pawn

1.) Vali beat Kokabiel because he (Vali) used Divine Dividing to [Divide] Kokabiel's power 3 times, making him (Kokabiel) as strong (or as weak) as a Mid-Level Fallen Angel. And all that stolen power went to Vali. So it just made it that much easier for Vali to beat Kokabiel.

2.) Heavely Dragon-Class doesn't necessarily mean you are equal to Ddraig & Albion. It just means that you're in the same league. That's why Crom, Apophis and Azi were considered Heavenly Dragon-Class, but were still a bit weaker than Ddraig & Albion. Crom did surpass Ddraig & Albion by vol. 23 though.

3.) Issei and Dulio are actually fairly matched in terms of power (with Issei being a bit higher). But Dulio is a "technique genius" with his Zenith Tempest, so it makes him the worst kind of opponent for Issei to face. It's the same reason Cao Cao was able to out-class Issei, Vali and Azazel despite them being stronger.