This metric got more attention than C, and we think it shows!

Dispersion is always tough for Instructions, but since everyone struggles the same, we can't complain.  Our favorite aspect of this method is using the conduit to let fire bypass the calcifier.  It does cost 2i to grab-drop the others on the conduit, but this is still markedly more streamlined than the other fire-handling ideas we tried.

The sads in question are the dispersion-feeding arm and the triplex-twiddling arm-on-track.  The former feels like something the input/output arm should be able to do.  Something like the latter is necessary in our approach because timing is irregular between pairs of products, but more space or cleverer timing would mitigate its whopping 6i.

Something in the range of 23i seems about right for this puzzle.