Sun Mica Grinding Wheel ★★

Taken all the way down to base materials, one Sun Mica Grinding Wheel is 3 crafting steps deep and needs 5 intermediates — Astral Birch Lumber ×2, Aurum Regis Ingot ×1, Birch Lumber ×2 and 2 others — which resolve to 13 distinct raw materials totalling 41 units, plus 30 crystals.

That bill outweighs 11,923 of the 13,602 recipes tracked here and 1,245 of the 1,552 Carpenter ones, and 337 recipes nest deeper.

Only 4 of those crystals go into the final step; the other 26 are burned by the intermediates, so the real crystal cost is 15 Wind Crystal, 6 Wind Cluster, 4 Ice Cluster and 3 other kinds.

The chain crosses three disciplines — Carpenter to Lv 60, Alchemist to Lv 60 and Goldsmith to Lv 60 — so no single class can finish it unaided.

8 of the 13 raw materials come out of the ground, and 6 of them are time-gated: Astral Moraine (0:00, 12:00), Aurum Regis Ore (2:00, 14:00) and 4 others. The widest gap between consecutive opening times is 8 Eorzean hours, about 23 real-world minutes.

Of the intermediates, Aurum Regis Nugget has the widest use: 185 recipes call for it, spanning seven of the eight crafting classes.