Adamantite Headsman's Axe

Taken all the way down to base materials, one Adamantite Headsman's Axe is 3 crafting steps deep and needs 5 intermediates — Adamantite Nugget ×3, Adamantite Rivets ×1, Aurum Regis Nugget ×1 and 2 others — which resolve to 8 distinct raw materials totalling 36 units, plus 38 crystals.

That bill outweighs 11,383 of the 13,602 recipes tracked here and 1,369 of the 1,932 Blacksmith ones, and 337 recipes nest deeper.

Only 3 of those crystals go into the final step; the other 35 are burned by the intermediates, so the real crystal cost is 20 Fire Crystal, 10 Wind Crystal, 5 Water Crystal and 2 other kinds.

The chain crosses four disciplines — Blacksmith to Lv 60, Alchemist to Lv 59, Carpenter to Lv 58 and Goldsmith to Lv 58 — so no single class can finish it unaided.

5 of the 8 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.