Regal Letter Box ★★★

Taken all the way down to base materials, one Regal Letter Box is 3 crafting steps deep and needs 6 intermediates — Cobalt Plate ×4, Undyed Woolen Cloth ×2, Ancient Lumber ×1 and 3 others — which resolve to 9 distinct raw materials totalling 34 units, plus 79 crystals.

That bill outweighs 11,052 of the 13,602 recipes tracked here and 1,771 of the 2,216 Goldsmith ones, and 337 recipes nest deeper.

Only 3 of those crystals go into the final step; the other 76 are burned by the intermediates, so the real crystal cost is 40 Fire Shard, 20 Ice Shard, 10 Lightning Shard and 3 other kinds.

The chain crosses five disciplines — Goldsmith to Lv 50, Carpenter to Lv 50, Armorer to Lv 43, Blacksmith to Lv 42 and Weaver to Lv 39 — so no single class can finish it unaided.

5 of the 9 raw materials come out of the ground, and 3 of them are time-gated: Gold Ore (9:00), Native Gold (4:00) and 1 other. The widest gap between consecutive opening times is 18 Eorzean hours, about 53 real-world minutes.

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