Jim is correct,
I recommend the Intellijel Quad VCA as it has lots of useful features like attenuators, CV control, boost control in small modular and works great. I also recommend logic modules and sequential switch and good clock source with clock divider/multiplier as these help with generative patches. You have Maths which is a great modulation source for functions and envelopes but a mixer/quad VCA would really help out your setup quite a bit.