Artisan's Grinding Wheel ★★★

Taken all the way down to base materials, one Artisan's Grinding Wheel is 3 crafting steps deep and needs 3 intermediates — Ancient Lumber ×1, Rose Gold Ingot ×1 and Rose Gold Nugget ×2 — which resolve to 7 distinct raw materials totalling 26 units, plus 13 crystals.

That bill outweighs 9,543 of the 13,602 recipes tracked here and 976 of the 1,552 Carpenter ones, and 337 recipes nest deeper.

Only 3 of those crystals go into the final step; the other 10 are burned by the intermediates, so the real crystal cost is 6 Wind Crystal, 5 Wind Cluster and 2 Ice Cluster.

The chain crosses two disciplines — Carpenter to Lv 50 and Goldsmith to Lv 50 — so no single class can finish it unaided.

4 of the 7 raw materials come out of the ground, and 3 of them are time-gated: Astral Rock (21:00), 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, Rose Gold Nugget has the widest use: 179 recipes call for it, spanning seven of the eight crafting classes.