the tricky thing with this puzzle is purification access, which i found most promising to solve with half-access debonder. overlapping the debonder with disposal means i can get rid of atoms relatively easily, and overlapping it further with the fire atom and unification leaves most of unification's hexes as free working space. after this, blocking input on antimony gives me a truly luxurious four directions of basically free space to work with.

in practice the most important thing this layout enables is the creation and disposal of air atom scaffolding, which is used first to juggle an earth from one side to the other to make quintessence, and later to enable spinning the product around to fix a couple bonds i could not otherwise get to without breaking the molecule.