Silvergrace Grinding Wheel ★★★

Taken all the way down to base materials, one Silvergrace Grinding Wheel is 3 crafting steps deep and needs 5 intermediates — Black Willow Lumber ×4, Hawk's Eye Sand ×3, Silvergrace Ingot ×2 and 2 others — which resolve to 13 distinct raw materials totalling 46 units, plus 34 crystals.

That bill outweighs 12,540 of the 13,602 recipes tracked here and 1,328 of the 1,552 Carpenter ones, and 337 recipes nest deeper.

Only 4 of those crystals go into the final step; the other 30 are burned by the intermediates, so the real crystal cost is 10 Wind Cluster, 6 Ice Cluster, 6 Lightning Cluster and 3 other kinds.

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

7 of the 13 raw materials come out of the ground, and 5 of them are time-gated: Black Willow Log (4:00, 16:00), Hawk's Eye (6:00, 18:00) and 3 others. The widest gap between consecutive opening times is 8 Eorzean hours, about 23 real-world minutes.

Of the intermediates, Gold Ingot has the widest use: 184 recipes call for it, spanning seven of the eight crafting classes.