User blog comment:Jopjopjop/Volume 20 Spoilers/@comment-73.46.6.122-20160203220433/@comment-71.205.30.36-20160223032357

Sairong Baal-kun = High Class; CCQ>Sairong Baal; CCQ=Ultimate Class

Euclid Lucifuge=Ultimate Class (minimum, Onee-sama Grayfia-san is Maou Class); CCQ+Longinus Smasher>Lucifuge; CCQ+BB=Maos Class

Rizevim=Super Devil; DxD>Rizevim; DxD>=Super Devil (within Ranks from Rizevim to Sirzechs-sama).

Thought I'd throw in a few honorifics :).