Shinryu's Ephemeral Rapier ★★

Taken all the way down to base materials, one Shinryu's Ephemeral Rapier is 3 crafting steps deep and needs 5 intermediates — Palladium Ingot ×3, Chromite Ingot ×2, Rhodonite ×1 and 2 others — which resolve to 12 distinct raw materials totalling 65 units, plus 55 crystals.

That bill outweighs 13,230 of the 13,602 recipes tracked here and 2,137 of the 2,216 Goldsmith ones, and 337 recipes nest deeper.

Only 4 of those crystals go into the final step; the other 51 are burned by the intermediates, so the real crystal cost is 21 Wind Crystal, 12 Fire Cluster, 10 Fire Crystal and 2 other kinds.

The chain crosses two disciplines — Goldsmith to Lv 70 and Blacksmith to Lv 70 — so no single class can finish it unaided.

8 of the 12 raw materials come out of the ground, and 3 of them are time-gated: Chromite Ore (10:00, 22:00), Palladium Ore (4:00, 16:00) and 1 other. The widest gap between consecutive opening times is 6 Eorzean hours, about 18 real-world minutes.

Of the intermediates, Palladium Nugget has the widest use: 129 recipes call for it, spanning seven of the eight crafting classes.