No great Art, but it does its Job.

How to read it:
Lines from above in a Cube are Input, Lines starting under a Cube are Output.

In the Cubes:
Topleft: What is produced
Bottomleft: Where it is produced
Right Side: What is needed for Production

I tryed to use the smallest number of intersects, but because its impossible without that i used Color differences for better reading.
This is purly a Production Tree to see what needs what, i dont added a Number of Buildings needed for "Optimal Flow" . Thats a choise for every Player him/herself (and the Number for the needed Resources shout give everyone an Idea how much they need).