I think the biggest thing I see here is that you have either 3 voices and 1 modulation module, or 4 voices and no modulation modules. Neither seems useful.
Second biggest thing: no VCAs.
Last question: how are you playing/sequencing this? That makes a difference for suggestions. If you're using midi, then not much to worry about... but if you're looking for in-rack sequencing, that would be good for us to know (though you have precious little space for it).
Assuming you want to keep this independent, I'd consider a 1u O_C, 1u VCAs, 1u noise/random, a 1u stereo mixer, and a Zadar or other quad modulation source.