Diamond Weapon Bust ★★★★

Taken all the way down to base materials, one Diamond Weapon Bust is 2 crafting steps deep and needs 3 intermediates — Duraluminum Ingot ×2, Dwarven Mythril Ingot ×2 and Solstice Ingot ×1 — which resolve to 7 distinct raw materials totalling 29 units, plus 38 crystals.

That bill outweighs 10,170 of the 13,602 recipes tracked here and 1,028 of the 1,441 Armorer ones, and 4,464 recipes nest deeper.

Only 6 of those crystals go into the final step; the other 32 are burned by the intermediates, so the real crystal cost is 14 Fire Crystal, 9 Earth Cluster, 9 Fire Cluster and 2 other kinds.

The chain crosses three disciplines — Armorer to Lv 80, Blacksmith to Lv 80 and Goldsmith to Lv 80 — so no single class can finish it unaided.

4 of the 7 raw materials come out of the ground, and 2 of them are time-gated: Dolomite (8:00, 20:00) and Solstice Stone (2:00, 14:00). The widest gap between consecutive opening times is 6 Eorzean hours, about 18 real-world minutes.

Of the intermediates, Dwarven Mythril Ingot has the widest use: 168 recipes call for it, spanning seven of the eight crafting classes.