This one is upgrade of the tech from previous post.
It's name is Universal Efficiency.
I think I did not miss any of production functions... connections for all scrappers and fabricators are there, only manual is exchanging them when needed. Tech with all 4 of both scrap and fab was to huge, mostly because of space needed between scrappers and fabricators so scrappers do not "eat" newly produced blocks, so I give up from that solution.
I am very much sure that there is no invader in game that can beat this tech.