Hmm...  That would get you 1,900 Quasits, for a total of 1,900d6 souls per week, I believe.<br/><br/>On the other hand, you could expend the same number of slots and get 1,400 Succubi, who would bring in 4,200d6 souls per week if you allowed them to go about their business.  After that, you could purchase Quasits in-play for a fairly cheap amount of souls and have them fill out your forces a bit.<br/><br/>I've even got a thought about a rather creepy take you could pull for these minions, if you'd be willing to allow a few 'points of light' to spring up amidst the vast darkness of your layer.  Just imagine a number of little villages dotting the plane, each one constructed out of wood cut from the immense black trees that grow throughout the layer.  The Succubi of your layer would make up the population of these villages, but each one would be shapeshifted into a humanoid form, all pretending to be quaint little villagers who fear the darkness and the monsters that prowl the night.  The villager part would be a disguise, meant to trick unwary travelers who come to the plane, but the fear would be very, very real...<br/><br/>Similarly, once you started getting Quasits, they would take on animal form and roam the vast forest in the form of bats and wolves, adding a little animal life to complete the illusion.<br/><br/>That's just one idea, though, and you might end up wanting to take your character in a completely different direction, instead. ^^;