since the rampage has no attenuators like the maths, it very much likes living near an Happy Nerding 3xMIA or 4MS SISM or Triatt or something. Pams New Workout packs a lot of envelopes and lfo's into a small package, maybe have a look at it.
when planning for an digitakt (which is a nice idea btw.) you could maybe get a little light on those samplers? and maybe use the space of that tiptop one and pico drums and pico seq for something else?
(with your yarns you can utilize 1 or 2 or 4 midi tracks of the digitakt in your rig over midi, no need for more sequencers imho)
maybe you can fit an disting mk4 into there? very useful multi purpose module for small systems.
also: VCA's (yes you can really never have enogh of them)
Zlob VnIcursal VCA, befaco hexmix vca, intellijel dual/quad vca, tangle quartet, veils etc.