Carbuncle Chair ★★★

Taken all the way down to base materials, one Carbuncle Chair is 2 crafting steps deep and needs 4 intermediates — Boar Leather ×6, Mahogany Lumber ×3, Spruce Lumber ×3 and 1 other — which resolve to 6 distinct raw materials totalling 32 units, plus 54 crystals.

That bill outweighs 10,750 of the 13,602 recipes tracked here and 1,100 of the 1,552 Carpenter ones, and 4,464 recipes nest deeper.

Only 3 of those crystals go into the final step; the other 51 are burned by the intermediates, so the real crystal cost is 24 Earth Shard, 15 Wind Shard, 9 Wind Crystal and 3 other kinds.

The chain crosses three disciplines — Carpenter to Lv 50, Goldsmith to Lv 50 and Leatherworker to Lv 33 — so no single class can finish it unaided.

4 of the 6 raw materials come out of the ground, and 2 of them are time-gated: Raw Ruby (18:00) and Spruce Log (9:00). The widest gap between consecutive opening times is 15 Eorzean hours, about 44 real-world minutes.

Of the intermediates, Boar Leather has the widest use: 117 recipes call for it, spanning six of the eight crafting classes.