Slothskin Armillae of Gathering ★★★

Taken all the way down to base materials, one Slothskin Armillae of Gathering is 2 crafting steps deep and needs 3 intermediates — Ground Sloth Leather ×4, Azurite ×1 and Hawk's Eye Sand ×1 — which resolve to 8 distinct raw materials totalling 24 units, plus 21 crystals.

That bill outweighs 8,926 of the 13,602 recipes tracked here and 1,247 of the 1,844 Leatherworker ones, and 4,464 recipes nest deeper.

Only 4 of those crystals go into the final step; the other 17 are burned by the intermediates, so the real crystal cost is 6 Earth Cluster, 6 Wind Cluster, 5 Wind Crystal and 2 other kinds.

The chain crosses three disciplines — Leatherworker to Lv 70, Alchemist to Lv 70 and Goldsmith to Lv 66 — so no single class can finish it unaided.

3 of the 8 raw materials come out of the ground, and 2 of them are time-gated: Hawk's Eye (6:00, 18:00) and Raw Azurite (4:00, 16:00). The widest gap between consecutive opening times is 10 Eorzean hours, about 29 real-world minutes.

Of the intermediates, Ground Sloth Leather has the widest use: 44 recipes call for it, spanning four of the eight crafting classes.