Carbuncle Bathtub ★★

Taken all the way down to base materials, one Carbuncle Bathtub is 3 crafting steps deep and needs 5 intermediates — Gold Ingot ×2, Palladium Ingot ×2, Star Ruby ×2 and 2 others — which resolve to 10 distinct raw materials totalling 41 units, plus 61 crystals.

That bill outweighs 11,923 of the 13,602 recipes tracked here and 1,918 of the 2,216 Goldsmith ones, and 337 recipes nest deeper.

Only 19 of those crystals go into the final step; the other 42 are burned by the intermediates, so the real crystal cost is 20 Wind Shard, 18 Wind Crystal, 9 Fire Shard and 2 other kinds.

Every step is Goldsmith work, from a Lv 40 intermediate up to the Lv 70 finish, so one class covers the whole chain.

8 of the 10 raw materials come out of the ground, and 3 of them are time-gated: Palladium Ore (4:00, 16:00), Gold Ore (9:00) and 1 other. The widest gap between consecutive opening times is 12 Eorzean hours, about 35 real-world minutes.

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