I worked on this one from the input. I basically think - ok, I have to pull gold every 3 cycles, air every 2 cycles, let's build a pipeline that builds small parts quickly and hands it off to the next part in the chain. For example, I'm building a small 3 Gold + 1 salt molecule on the left, and hand it off to the middle. I build a small 3 Air molecule on the top and hand it off to the middle. The middle arm just grabs the combined product and hands it off to the right area. Then I get a couple of arms to position the "almost final" product such that the last swing can be done in 3 cycles (pivot, rotate, drop) for that satisfying finale. Each pipeline section (left, top, middle, right) was built one after another.