Clouds really needs an attenuation module as a patch pal, so you can control the amount of modulation you send to the parameters and have more subtle modulations (compare, e.g., the Echophon, which has attenuverters on board for this job (the white knobs)). I'd also think about getting something like a Wogglebug which would give you a tactile random source with which to modulate your other parameters.
Mixer wise, you might look into the Intellijel Dub Mix with the Aux expanders.
Also, maybe have look at the Phonogene.