I gefinitely agree with @Sweelinck, get a bigger case... and as you have the minibrute, I'd definitely recommend the rackbrute 6u... so they can be joined together as a single unit...
The problems with a smaller case like this are mostly that you will almost definitely want more modules very quickly... that's not to say that you'll want to fill the case in a week (you might), but you almost definitely will in the future...
I also somewhat agree with him on the modules are tailored towards particular genres, but I'm more of the thought that any module can be used for any genre... it's not the module that makes the music, it's the artist... but it is a good idea to indicate the sort of music you want to make...
now onto your choices of modules...
1 psychosis... why a stereo mixer? neither the minibrute or the hysteria & vcf combo are stereo... I guess (manual) panning and effects... but there's not a lot of control over either... better to split these 2 out and get something with cv-able panning... these are modules... better to have 1 module do 1 thing, why? so if you get bored or outgrow that 1 thing you can swap it... so better a mixer and an effects unit... for an effects module - the fx aid pro, is as good as anything for, price, size, sound quality and versatility... the smaller ones are ok.. but their interface is severely compromised by not having a display...
2 a doepfer dual adsr... why? what are you going to use the adsr for? using the filter as a pseudo vca? that takes 1 channel... so the other will be used for what?
3 hysteria... ok it's a vco... your only source of pitch information is the minibrute, which will already be quantized, so the quantize function is pointless, taking into account the rest of the modules present...
4 a filter ok
BUT what's missing... the important bits... particularly vcas and modulation at this stage...
for vcas: a quad cascading vca is a worthwhile investment (a veils clone for example) - it can also double up as a mono mixer... vcas are one of the fundamental building blocks of synthesis... they are massively important for note shaping and gain control within synthesizers and can also be used for modulation sources, to control the amount of modulation being sent to a module, with another modulation source (modulating modulation - a very powerful technique)
modulation: I'd rather have a decent quad lfo (batumi perhaps) or a good function generator (maths, perhaps) - or even better both - than an adsr in a limited set of modules to combine with a minibrute (the minibrute already has an adsr & no real way of creating a second gate to drive a second envelope generator)
maths - download the 'maths illustrated supplement' this is imo by far the most useful piece of documentation for eurorack modules... buy a maths and work your way through it... concentrating on what, why and how the patches work... this will not only introduce you to patch programming maths, but will also serve as a primer for patching modular synthesizers in general
if you only have the money for this case and this set f modules... I'd buy the rackbrute and a maths... you'll learn more and be able to do more... and then add a second voice in the future when you can afford one...
also take a look at my signature - read it, think about it, think some more, ask questions, think some more and then redesign your rack taking into account advice (not just mine), etc, or don't...
-- JimHowell1970
So for the build I have the rackbrute 6u, maths, viggen (veils clone), batumi quad lfo, and rez (rings clone). That should be everything for now.