Acacia Necklace

Taken all the way down to base materials, one Acacia Necklace is 2 crafting steps deep and needs 3 intermediates — Acacia Lumber ×1, Dark Mahogany Lumber ×1 and White Gold Ingot ×1 — which resolve to 4 distinct raw materials totalling 16 units, plus 40 crystals.

That bill outweighs 6,959 of the 13,602 recipes tracked here and 675 of the 1,552 Carpenter ones, and 4,464 recipes nest deeper.

Only 16 of those crystals go into the final step; the other 24 are burned by the intermediates, so the real crystal cost is 32 Wind Crystal and 8 Ice Crystal.

The chain crosses two disciplines — Carpenter to Lv 96 and Goldsmith to Lv 96 — 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, White Gold Ingot has the widest use: 121 recipes call for it, spanning seven of the eight crafting classes.