Correct me if I’m wrong, but i’m pretty sure the monome Ansible module replaces the functionality of Meadowphysics, white whale and earthsea. They’re discontinued. Good news is that opens up a few more Hp in your rack for more modules! I would definitely add a fixed filter bank and another small mixer or two to shape the spectral content of… pretty much everything. I like the Make Noise FXDF. I also can’t stress the importance of mixers in a system like yours, with lots of VCOs with multiple waveform outputs, and many modulation hungry modules like the ER-301 and clouds, adding mixers will greatly increase the capability of your rack.
Seconded on the advice to ditch the synthrotek verb. Not only is the owner an asshole but his modules are known to have issues all the time.
The Erica Synths Pico DSP is smaller and has more FX algorithms than just reverb!
Other than that, I’d say try to find some room for a randomness module. Randomness is one of the best ways to get an ambient patch moving, evolving and breathing.