Skybuilders' Alchemic

Taken all the way down to base materials, one Skybuilders' Alchemic is 2 crafting steps deep and needs 1 intermediate — Golden Honey ×1 — which resolves to 4 distinct raw materials totalling 29 units, plus 13 crystals.

That bill outweighs 10,170 of the 13,602 recipes tracked here and 1,354 of the 1,591 Alchemist ones, and 4,464 recipes nest deeper.

Only 6 of those crystals go into the final step; the other 7 are burned by the intermediates, so the real crystal cost is 7 Fire Crystal, 4 Water Crystal and 2 Lightning Crystal.

The chain crosses two disciplines — Alchemist to Lv 80 and Culinarian to Lv 74 — so no single class can finish it unaided.

All 4 raw materials are gathered, and not one of their spots is timed, so nothing in the tree waits on the Eorzean clock.

Of the intermediates, Golden Honey has the widest use: 12 recipes call for it, spanning two of the eight crafting classes.