Well, for starters, that Intellijel MIDI interface is discontinued. They now offer the smaller one in tile format, but if you need something beefier, you'll have to stick it in the 3U row.
From what I can tell, you're looking to build a modulation "auxiliary" cab that also has some FX processing. But limiting yourself to ONLY Intellijel has problems, namely that there's other firms that make similar but better modules for various reasons. For example, you've got an Intellijel Quad VCA. But the topology for that 12 hp module is pretty much the same with Mutable's Veils...albeit that the Veils gives you 2 hp back. When planning a small "mission-specific" skiff, economizing your module sizes without compromising the result (ie: controls that are too tight or too small, overcrowded panels that offer confusing indications, etc). Also, to get a really diverse collection of suitable and interacting modules will probably require more than 62 hp; I would suggest moving up to the Palette 104 instead. Sort of like...(big pause while I rev up the building neurons) THIS:
Bigger, true...but in this case, bigger IS better, as it allows you to build a more comprehensive set of both modulators AND effects.
The "utility" row now has your adders, so no need for that module. It also has your stereo jacks for both input and output, mults, and MIDI port. Then when we get into the tile row, you'll notice a stereo input (fed by 1/4" jacks 1 and 2) and the smaller Intellijel tile MIDI interface (fed from the MIDI port). And then things get interesting; the next thing is a dual noise generator with tilt EQ to alter the noise color. After that is your clocking...an expander gives you four CV ins to the Temps Utile, which I chose over the Pam's because 1) this fits better and 2) if you're looking to ALSO use this as a sequencer, I think it has a better implementation for that. And yes, it can clock and sequence and all that at the same time. Following that is a QuadrATT, which gives you four channels of attenuversion, mixable to a "breakable" mixbus. And then, the stereo out module, which feeds 1/4" jacks 3 and 4.
Then for the 3U row, it looks like this: an SSF Modbox has two CVable LFOs, one of which also clocks its sample and hold, plus it has yet another (uncolored) noise gen and a few other tricks. Then the modulation monolith that IS Maths. After that you'll find a Mutable Veils and a Tiptop MISO...these are intended to work together as VCA control over modulation amplitude and modulation mixing, inversion, offset and more voodoo via the MISO. Quadrax/Qx is next, and then a Make Noise ModDemix gives you a pair of balanced modulators which you can use either to manipulate modulation OR as an audio effect. Then we're into the audio-only effects with a Frequency Central Stasis Leak, which gives you tap-tempo delay, reverb, and chorus, and uses a mono-to-stereo signal path for stereoization. The Purrvrrb emulates a spring reverb, with (again) mono-in and stereo-out. And then the big kahuna there is Mutable's sequel to their Clouds granular module, the Beads. And last, since you'll have three different stereo FX sources, I put in a triple-input stereo mixer so that, if you want, you can mix the FX outputs.
Now, if I stuck to ONLY Intellijel modules here, I clearly wouldn't be able to build this. And this is typical for Eurorack; not all manufacturers have the "perfect" module selection that covers everything, so it's necessary to do mix-n-match stuff like this to really optimize a build. Anyway, this is an example of how I would approach this problem...and actually, it's similar to an actual issue I have in my "modular sandbox", where I've been considering a modulation skiff to fill in a few shortcomings in my 3.5mm stuff (Eurorack, Digisound 80, B.2600, and some other odd things). And this build is something even I would feel at home with...and I'm a fussy SOB about that sort of thing!