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I would remove the adsr, the dsp, the quad lfo and rosie

do you really need an adsr? generally these are pretty much set and forget so 2hp work really well - or if you need something more variable sellf patch maths - see illustrated manual - if you really need a 'complex' adsr - I'm sure you can find another one that is a nice even 6hp so that you can upgrade the pico dsp to the happy nerding fx aid

the pico dsp is based on the same chip as the fx aid - but the fx aid however is much more versatile - you can swap the programs and can do both stereo in stereo out and mono in stereo out

you have Maths as a modulation source - which imo is enough in this size case - see below on how to make it go further

in my opinion Rosie is pretty pointless and takes up a lot of space for what it is - either use the vca or the effect module as a final stage and listen in mono or the effect module as a final stage and listen in stereo - use a 2hp headphone module if you specifically need headphones - if you desperately want a crossfader you can patch it with maths - see illustrated manual

that would save you 30hp

with that I would put in -
6hp - an original plaits - much more ergonomically friendly
2hp - 2hp headphone module
4hp - fx aid - much more versatile than the pico dsp (and an even size!)
8hp - mutable links and kinks - incredibly useful beginner starter set - adds a buffered mult, 2 utility mixers*, a rectifier, basic logic and a sample and hold - these are all incredibly useful in terms of both audio and (particularly in a small case like this) cv - you can use a minimal amount of modulation - ie Maths - and extend it in many different ways - to produce a further 7 related modulation sources (helps if you get some stackcables for this!) just from kinks

and then either

10hp - AISynthesis matrix mixer - just because matrix mixers rock - AISynthesis seem like a great company - and it fits in 10hp!

or

2hp - 2hp adsr - if you really need an adsr
8hp - doepfer quad vca - because you can never have too many vcas

or

8hp - disting ex - incredibly useful in any sized case - especially for beginners to work out what modules actually do
2hp - 2hp adsr or even better vca

or

4hp - disting mk4 - really useful in any size case - especially for beginners to work out what modules actually do
6hp - leave blank until disting tells you what to put there