Given what you already have what are you trying to do, but feel limited in doing? Before adding more voices I would focus on adding utilities to get the most out of the voices you already have. Trying to get multi-voice polyphony in a case this small is a recipe for disaster, plenty of voices just not enough tone sculpting ability so you won't be able to get the most out of all of them.
Are you planning on doing all drums in case, BIA is great module but you don't seem to have enough modulation to really drive two of these, while stages is a great module you might want something like a quad lfo (batumi for cadillac, doepher for value/hp) instead since you have a voltage block as well.
I love the SSF dipole, but not as my primary filter, I would look at the Polaris great bang for the buck filter (saves HP).
Needs some attenuverters, 3xMIA, Lapsus Os, matrix mixer, mutes, switches, etc.
Look at 4ms I/O similar output module 6HP, there are others as well I just happen to own this one.
I will definitely let more experienced people chime in, but I think you would quickly become frustrated with your ability to carve space for all these voices with the lack of utilities.