Adamantite Zweihander

Taken all the way down to base materials, one Adamantite Zweihander is 2 crafting steps deep and needs 5 intermediates — Adamantite Nugget ×4, Aurum Regis Nugget ×2, Birch Lumber ×1 and 2 others — which resolve to 10 distinct raw materials totalling 52 units, plus 54 crystals.

That bill outweighs 12,890 of the 13,602 recipes tracked here and 1,756 of the 1,932 Blacksmith ones, and 4,464 recipes nest deeper.

Only 10 of those crystals go into the final step; the other 44 are burned by the intermediates, so the real crystal cost is 25 Fire Crystal, 15 Wind Crystal, 10 Earth Crystal and 1 other kind.

The chain crosses five disciplines — Blacksmith to Lv 58, Carpenter to Lv 58, Goldsmith to Lv 58, Leatherworker to Lv 56 and Alchemist to Lv 55 — so no single class can finish it unaided.

6 of the 10 raw materials come out of the ground, and 3 of them are time-gated: Adamantite Ore (0:00, 2:00, 6:00, 10:00, 12:00, 14:00, 18:00, 22:00), Darksteel Ore (1:00) and 1 other. The widest gap between consecutive opening times is 4 Eorzean hours, about 12 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.