User blog comment:B214/Volume 23 discussion blog/@comment-5.36.122.247-20170901110204/@comment-31137559-20170901144541

That's kind of almost impossible to compare. We have no idea of how strong Mahabali is or where his general power level lies. Most of them are among the Ultimate-class devil power levels. And some like Diehauser, Falbium, and Shemhazai are basically among the Satan-class brackets. I'll try my best.

From Weakest to Strongest:

Rudiger Rosenkreutz(Ultimate-class)

Euclid(Ultimate-class)

Fafnir, Yu-Long, Grendel, Tannin(Ultimate-class)

Surtr Second, Vasco Strada, Kokabiel(Upper-tier Ultimate-class)

Pluto, Shemhazai(mid-tier Satan-class)

Falbium, Diehauser, Dulio(upper-tier Satan-class)

Loki