Gold Plating

Taken all the way down to base materials, one Gold Plating is 2 crafting steps deep and needs 3 intermediates — Deepgold Nugget ×2, Dwarven Mythril Ingot ×1 and Dwarven Mythril Nugget ×1 — which resolve to 6 distinct raw materials totalling 20 units, plus 40 crystals.

That bill outweighs 7,876 of the 13,602 recipes tracked here and 851 of the 1,932 Blacksmith ones, and 4,464 recipes nest deeper.

Only 14 of those crystals go into the final step; the other 26 are burned by the intermediates, so the real crystal cost is 26 Fire Crystal, 7 Earth Crystal and 7 Wind Crystal.

The chain crosses two disciplines — Blacksmith to Lv 80 and Goldsmith to Lv 78 — so no single class can finish it unaided.

All 6 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, Dwarven Mythril Ingot has the widest use: 168 recipes call for it, spanning seven of the eight crafting classes.