Dragonscale Grinding Wheel

Taken all the way down to base materials, one Dragonscale Grinding Wheel is 2 crafting steps deep and needs 2 intermediates — Birch Lumber ×2 and Aurum Regis Nugget ×1 — which resolve to 4 distinct raw materials totalling 18 units, plus 25 crystals.

That bill outweighs 7,380 of the 13,602 recipes tracked here and 740 of the 1,552 Carpenter ones, and 4,464 recipes nest deeper.

Only 10 of those crystals go into the final step; the other 15 are burned by the intermediates, so the real crystal cost is 20 Wind Crystal and 5 Ice Crystal.

The chain crosses two disciplines — Carpenter to Lv 59 and Goldsmith to Lv 58 — so no single class can finish it unaided.

3 of the 4 raw materials come out of the ground, and one of them is time-gated: Gold Ore (9:00). That window comes round once per Eorzean day, every 70 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.