User blog comment:Piyush Banerjee/Shin DxD 2 discussion/@comment-32252462-20190113135841/@comment-104.221.76.100-20190118204634

Let's just end this : The author stated in an afterword that Hades was in the top 10 strongest of the DXDverse. In volume 12, when sirzech shows his full power to Hades, Sirzech states that if Hades tries anything funny he'll kill him. Flash forward to volume 21\22 (The one where 666 is sealed again), Sirzech goes all out again. This time, the red heavenly dragon (don't remember his name) straight up stated that sirzech was as powerful as an heavenly dragon. As for ajuka, he's stated to be sirzech's only rival so you can assume that they are close in strength. Those two are so powerful, they have their own class: Super devils. While the OG lucifer and beelzebub were definitely no pushovers, the lore strongly implies that Ajuka and Sirzech are stronger than those two.