There's a lot of big modules here, which might be ok but I'd probably want to fit a ton more little things in here to really leverage the power of the bigger modules. I know you're planning on using the ES-9 but personally I like getting away from the computer, so ideas that come to mind: Links, Kinks, Rnd Step, Ochd, Cold Mac, Crow, Ladik across the board, Tirana, Turing Machine or 2HP TM, more VCAs (the VCA matrix is less flexible in reality than it looks on paper), Serge NCOM (though you do have a Compare 2), DC coupled ring modulators (in particular the Befaco A*B+C), clock dividers... that's what I can think of for now at least.
To start, I'd drop the Rainmaker and the Tripler Waveshaper (kind of redundant since your oscillators are complex already, plus the other Serge wavefolder is generally regarded as superior) and see what of the above makes sense to you to fit in. IMHO you'd come out with a far more flexible and adventurous rack.
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