User blog comment:B214/Volume 23 discussion blog/@comment-5480911-20170213225853/@comment-26709288-20170216220809

Glad we can at least agree that Issei's entire peerage wasn't a total waste. I believe if Ravel learns how to develop her own unique style with her Phenex abilities she could be a good bishop, the problem is she hasn't gotten there yet and only knows how to use standard phenex flames.

Yeah but it's not just the sacred gear you have, it's also how you learn how to use and manipulate it. All sacred gears have the potential to become longinus class, which is why Forbidden Balor view is considered to have the potential to become the 14th longinus.

What if Asia figures out how to seal dragons in her sacred gear, she can then use them in battle without actually having to summon them thus this would get around the familiar ban.

I would honestly think Asia would be better if she learned some better support spells, like the sky dragon slayer magic from Fairy Tail. This would make her more useful as a support-type bishop.

And last, I'm pretty sure Riser wouldn't have had such a reputation if he was only picking on weak teams, the devils, especially the higher ups would've caught onto this. And I don't believe you pick your opponent in every Rating Game. From what we seen: Rias's and Riser's rating game was solely because she wanted to get out of her marriage with him and all the other rating games were tournament style where they were chosen by someone else. And if Riser knew he was a weakling and was intentionally picking on weak teams I don't think Issei defeating him would've affected him as badly as it did.

I think all of Issei's peerage members being his lovers can be a benefit, but they have to control their emotions or personal feelings when fighting.