Core Space you say? Very curious to hear more if you care to share.
Sorry for the late reply
We finished off one narrative run of Core Space and I wanted to mix things up so started another campaign from the end of the last one where one of my crew spent their UA on a nice puzzle box they found
needless to say that crew quickly disappeared after unleashing the cenobites who then wanted to find who had created this new box. We ran around 7 or eight missions all told with the cenobites finally being banished back to hell (but it was a close one!).
I ran the cenobites as a crew but treated them more as NPC's who would drive the narrative forward and made up the missions as I went along to fit the ongoing narrative.