Okay this is what I thought but wasn't sure
So here is what I have on my abyss-like demi-plane:
2 cooperating Demon Lords.
#1 (Sccarrotbalo) of which is more powerful than the other as he is the one who generates the dark magic's on the said demi-plane and who is the one collecting souls for the demi-plane which is a sort of rogue Underworld
#2 (Stuctratus the Hammer) a collossal scale engineer, builder of fortifications, commander of the dretch-like demons that inhabit the demi-plane in question.
In addition under the command of Structratus:
2 Demons (of middling power -- councilors to Stratratus and overseerers of the dretch-like demons)
And under #2 demon as well are 50,000 dretch-like demons