Shinryu's Ephemeral Cane ★★

Taken all the way down to base materials, one Shinryu's Ephemeral Cane is 3 crafting steps deep and needs 4 intermediates — Torreya Lumber ×3, Chromite Ingot ×2, Palladium Nugget ×2 and 1 other — which resolve to 10 distinct raw materials totalling 56 units, plus 44 crystals.

That bill outweighs 12,997 of the 13,602 recipes tracked here and 1,392 of the 1,552 Carpenter ones, and 337 recipes nest deeper.

Only 4 of those crystals go into the final step; the other 40 are burned by the intermediates, so the real crystal cost is 10 Fire Crystal, 10 Wind Crystal, 8 Ice Cluster and 3 other kinds.

The chain crosses three disciplines — Carpenter to Lv 70, Blacksmith to Lv 70 and Goldsmith to Lv 68 — so no single class can finish it unaided.

6 of the 10 raw materials come out of the ground, and 2 of them are time-gated: Chromite Ore (10:00, 22:00) and Torreya Log (6:00, 18:00). The widest gap between consecutive opening times is 8 Eorzean hours, about 23 real-world minutes.

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