Ignoring everything else going on, obviously I disagree with the thread(MoL blast should still be usable even if you argue the 5-B end shouldn't) or scaling normal sinners to Overlords in any way(Don't forget, Overlords regularly gore and rip apart normal sinners)
But assuming it all goes through...
5-B: Lucifer, Adam
Low 7-C: FP Alastor
8-B: Shok.wav, W!Alastor Demon Form, 100% Vox(Unless you rate Shok.wav as 9-A, 8-B via Kinetic Energy, Vox would scale to the 8-B, if downscaling due to other factors like Alastor refusing to fight it head on, scaling chain would be Shok.wav>100% Vox>W!Alastor)
(My scaling) 9-A, possibly 8-B: Vees, Husk, etcetera, scale to Vox's 9-A feat, and 8-B comes from Velvette being able to minority harm 100% Vox with a kick. Scaling chain would be W!Alastor>Base Vees=Husk and Niffty>Cherri[still disagree but I digress]). Vox would get something mentioning FP Alastor, but that's just me and for another thread since it's controversial.
Weirdos: Carmilla, Excorcists, other rando Overlords, and Zestial. Don't know where to put them exactly. Probably 9-A, possibly 8-B for the excorcists, being honest, but the rest I dunno.