Hingan Hot Spring ★★

Taken all the way down to base materials, one Hingan Hot Spring is 3 crafting steps deep and needs 4 intermediates — Torreya Lumber ×5, Oroshigane Ingot ×3, Steel Joint Plate ×2 and 1 other — which resolve to 6 distinct raw materials totalling 61 units, plus 46 crystals.

That bill outweighs 13,148 of the 13,602 recipes tracked here and 1,425 of the 1,552 Carpenter ones, and 337 recipes nest deeper.

Only 4 of those crystals go into the final step; the other 42 are burned by the intermediates, so the real crystal cost is 12 Fire Crystal, 12 Ice Cluster, 12 Wind Cluster and 2 other kinds.

The chain crosses three disciplines — Carpenter to Lv 70, Blacksmith to Lv 64 and Armorer to Lv 27 — so no single class can finish it unaided.

4 of the 6 raw materials come out of the ground, and one of them is time-gated: Torreya Log (6:00, 18:00). The widest gap between consecutive opening times is 12 Eorzean hours, about 35 real-world minutes.

Of the intermediates, Steel Ingot has the widest use: 125 recipes call for it, spanning seven of the eight crafting classes.