User blog comment:B214/Question and Answers 6/@comment-185.112.105.215-20161128063206/@comment-10330822-20161129014419

I don't know about it, Indra seems to still think he could erase Issei should be become a problem, despite all the power Issei has gotten. I feel its more likely he's superior to Ddraig under normal conditions, and something like DxD is needed to actually beat him.

Plus, is it confirmed only those four are stronger than Albion and Ddraig? I would think Zeus would be stronger than them too, and maybe Odin. Plus you have characters like Thor and Mars. They should be very powerful too.