This is how I have my Shared System setup now:

and the 3u expander I use with it:

The Seq1 is what I use to create more complex sequences (stuff I would need to recall later) but it's also great for more generative stuff. That said, I usually combine sequences, from multiple sources, either using the O&C or the Doepfer Precision adder.
I'm not saying that is the way to go but it's certainly a way to go.
The synth parts of this peice were generated by the Shared System and 0-Coast, using the Rene, Pressure Points+Brains and Seq1 for sequencing:
Drums were from the system behind me.
But you can get interesting generative stuff from a much smaller system. This piece was done with just 3u and a Filed Kit and a few outboard effects: