Nullifying Neckpiece

Taken all the way down to base materials, one Nullifying Neckpiece is 3 crafting steps deep and needs 3 intermediates — Dwarven Mythril Nugget ×2, Petalite ×1 and Tuff Whetstone ×1 — which resolve to 4 distinct raw materials totalling 16 units, plus 32 crystals.

That bill outweighs 6,959 of the 13,602 recipes tracked here and 1,002 of the 2,216 Goldsmith ones, and 337 recipes nest deeper.

Only 4 of those crystals go into the final step; the other 28 are burned by the intermediates, so the real crystal cost is 30 Wind Crystal and 2 Fire Crystal.

Every step is Goldsmith work, from a Lv 76 intermediate up to the Lv 78 finish, so one class covers the whole chain.

All 4 raw materials are gathered, and one of them is time-gated: Raw Petalite (6:00, 18:00). The widest gap between consecutive opening times is 12 Eorzean hours, about 35 real-world minutes.

Of the intermediates, Dwarven Mythril Nugget has the widest use: 154 recipes call for it, spanning seven of the eight crafting classes.