Slothskin Ring of Gathering ★★★

Taken all the way down to base materials, one Slothskin Ring of Gathering is 2 crafting steps deep and needs 3 intermediates — Ground Sloth Leather ×2, Hawk's Eye Sand ×1 and Palladium Nugget ×1 — which resolve to 8 distinct raw materials totalling 19 units, plus 17 crystals.

That bill outweighs 7,589 of the 13,602 recipes tracked here and 958 of the 1,844 Leatherworker ones, and 4,464 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 5 Wind Crystal, 4 Earth Cluster, 4 Wind Cluster and 2 other kinds.

The chain crosses three disciplines — Leatherworker to Lv 70, Alchemist to Lv 70 and Goldsmith to Lv 68 — so no single class can finish it unaided.

3 of the 8 raw materials come out of the ground, and one of them is time-gated: Hawk's Eye (6:00, 18:00). The widest gap between consecutive opening times is 12 Eorzean hours, about 35 real-world minutes.

Of the intermediates, Palladium Nugget has the widest use: 129 recipes call for it, spanning seven of the eight crafting classes.