User blog comment:B214/Talk About What You Want! 2/@comment-75.105.131.164-20140727002147/@comment-24982259-20140727055237

I doubt that Rizevim is rated as a Super Devil just becuase of his ability to cancel SG powers, since if that where the case ... there would be pretty much no point for Sierzechs to design his peerage into a perfect counter Rizevim team.

After all, if Sierzechs would actually be a lot stronger then Rizevim in his true form, there would be pretty much no point in designing his peerage like that, since he could just fight Rizevim in a one vs one fight without worrying about Rizevim's SG nulification ability - since Sierzechs isin't a SG possesor.

Basically the way that Sierzechs constructed his peerage, suggests to me that even Sierzechs, with all the power that he has, is taking into considiration the possibility, that he won't be capable of defeating Rizevim on his own which, in my opinion, suggests that Rizevim has a few more abilities that the author hasn't revealed yet and  those abilities are the true reason, why Rizevim is considered as the third Super Devil in the DxD universe.