Carbuncle Armchair ★★★

Taken all the way down to base materials, one Carbuncle Armchair is 3 crafting steps deep and needs 5 intermediates — Hippogryph Leather ×4, Undyed Woolen Cloth ×4, Cobalt Ingot ×3 and 2 others — which resolve to 8 distinct raw materials totalling 30 units, plus 53 crystals.

That bill outweighs 10,368 of the 13,602 recipes tracked here and 1,521 of the 1,844 Leatherworker ones, and 337 recipes nest deeper.

Only 3 of those crystals go into the final step; the other 50 are burned by the intermediates, so the real crystal cost is 20 Lightning Shard, 15 Fire Shard, 12 Earth Crystal and 3 other kinds.

The chain crosses four disciplines — Leatherworker to Lv 50, Goldsmith to Lv 50, Blacksmith to Lv 42 and Weaver to Lv 39 — so no single class can finish it unaided.

4 of the 8 raw materials come out of the ground, and one of them is time-gated: Raw Ruby (18:00). That window comes round once per Eorzean day, every 70 real-world minutes.

Of the intermediates, Undyed Woolen Cloth has the widest use: 154 recipes call for it, spanning seven of the eight crafting classes.