I heavily recommend using unloaders for them super compact schematics, given how they can extract resources off of, say, a pyratite mixer into other pyratite mixers, and since they don't accept anything but coal, sand, and lead, they won't clog (Also it makes it so you only need 1 input per resource, instead of 1 per resource for all the mixers)
Optimizing the placements is the bigger challenge
As for logic, i got no clue either xd
just ask for help i the discord, them guys are real generous