Artisan's Mitts ★★★★

Taken all the way down to base materials, one Artisan's Mitts is 3 crafting steps deep and needs 4 intermediates — Silk Thread ×2, Hard Hippogryph Leather ×1, Platinum Nugget ×1 and 1 other — which resolve to 8 distinct raw materials totalling 23 units, plus 17 crystals.

That bill outweighs 8,647 of the 13,602 recipes tracked here and 1,208 of the 1,844 Leatherworker ones, and 337 recipes nest deeper.

Only 4 of those crystals go into the final step; the other 13 are burned by the intermediates, so the real crystal cost is 6 Earth Crystal, 4 Wind Cluster, 3 Earth Cluster and 2 other kinds.

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

4 of the 8 raw materials come out of the ground, and 2 of them are time-gated: Platinum Ore (4:00) and Silkworm Cocoon (1:00). The widest gap between consecutive opening times is 21 Eorzean hours, about 61 real-world minutes.

Of the intermediates, Silk Thread has the widest use: 175 recipes call for it, spanning six of the eight crafting classes.