Hi there
I'm also a beginner and there's not much advice I can give :-)
But if you want so save 4HP you can get the ALM Tangle Quartet. It's a Quad VCA like the Intellijel but you don't have adjustable response from linear to exponential. I have the Tangle myself and it does its Job :-)
You have a Moog and you plan to get a dixie. Maybe you could consider a Wavetable Oscillator instead of the Dixie?
Don't worry about the placement. Just put the Modules where you think its best and then you will see if you want to swap.
EDIT:
I see you don't have any effects like Delay or Reverb.