Longcase Chronometer ★★★

Taken all the way down to base materials, one Longcase Chronometer is 2 crafting steps deep and needs 4 intermediates — Ancient Lumber ×2, Cobalt Ingot ×2, Gold Ingot ×2 and 1 other — which resolve to 9 distinct raw materials totalling 24 units, plus 35 crystals.

That bill outweighs 8,926 of the 13,602 recipes tracked here and 904 of the 1,552 Carpenter ones, and 4,464 recipes nest deeper.

Only 3 of those crystals go into the final step; the other 32 are burned by the intermediates, so the real crystal cost is 10 Fire Shard, 10 Wind Cluster, 10 Wind Shard and 2 other kinds.

The chain crosses three disciplines — Carpenter to Lv 50, Goldsmith to Lv 50 and Blacksmith to Lv 42 — so no single class can finish it unaided.

6 of the 9 raw materials come out of the ground, and 3 of them are time-gated: Gold Ore (9:00), Native Gold (4:00) and 1 other. The widest gap between consecutive opening times is 18 Eorzean hours, about 53 real-world minutes.

Of the intermediates, Gold Ingot has the widest use: 184 recipes call for it, spanning seven of the eight crafting classes.