A quick glance shows at least 6 oscillators and only one 4-channel mixer. How do you plan to route your signals?

Do you need two different noise sources?

There is a decent mix of utilities other than mixers: switches, clock dividers, s & h, slew limiter, attenuator, et al.

Personally, I'd ditch several of the oscillators in exchange for more mixers and attenuvertors.

Best of luck!!

“You must have chaos within you to give birth to a dancing star.”
― Friedrich Nietzsche