I would recommend you consider what each module's core functionality is, and how they'll interact. True, modular is a very mutable interface, but you're going to need to look into a few different types of modules to help smooth over the way different modules interact - namely, smaller mixers, attenuators/attenuverters, and VCA's. This allows you to group and adjust control voltage on the fly, and there are some modules that will check off some of this list in one module (like Mutable's Blinds or Befaco's A*B+C).
You'll also want dedicated envelope and/or LFO modules. True, you do get that out of Tides, but Rings, Warps, Braids, and the Telharmonic aren't necessarily the best for something like audio-rate modulation, which Tides will give you in spades. I think you'll find yourself using it at audio rate more often than as a dedicated envelope generator or LFO.
I'd suggest taking a step back and start a little smaller. Pick out one of each:
* one of those main sound sources (look into Plaits - it's the next gen Braids)
* a modulator (like Tides)
* a dedicated envelope generator
* something that provides mixing and attenuversion and VCA, if possible
* a dedicated output module (which Pittsburgh's interface can provide)
* a sequencer, random module (e.g. Marbles), or Midi control module (unless you have something like the Arturia Keystep that gives you CV out)
This would give you a wealth of possibilities to work with while giving you space to explore and master control voltage. When you choose to expand and pick up more of the modules on your list, you'll be better prepared to use them. But you'll find that, after a bit of playing around, that that alone will give you a pretty wide palette of possibilities.