Leatherworking Bench ★★★

Taken all the way down to base materials, one Leatherworking Bench is 2 crafting steps deep and needs 3 intermediates — Darksteel Nugget ×4, Rosewood Lumber ×4 and Ancient Lumber ×1 — which resolve to 6 distinct raw materials totalling 29 units, plus 42 crystals.

That bill outweighs 10,170 of the 13,602 recipes tracked here and 1,053 of the 1,552 Carpenter ones, and 4,464 recipes nest deeper.

Only 3 of those crystals go into the final step; the other 39 are burned by the intermediates, so the real crystal cost is 24 Wind Shard, 12 Fire Crystal, 4 Wind Cluster and 1 other kind.

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

3 of the 6 raw materials come out of the ground, and 2 of them are time-gated: Darksteel Ore (1:00) and Scarlet Sap (3:00). The widest gap between consecutive opening times is 22 Eorzean hours, about 64 real-world minutes.

Of the intermediates, Darksteel Nugget has the widest use: 121 recipes call for it, spanning seven of the eight crafting classes.