Adamantite Greatsword

Taken all the way down to base materials, one Adamantite Greatsword is 3 crafting steps deep and needs 6 intermediates — Adamantite Nugget ×4, Titanium Ingot ×2, Amphiptere Leather ×1 and 3 others — which resolve to 12 distinct raw materials totalling 62 units, plus 56 crystals.

That bill outweighs 13,194 of the 13,602 recipes tracked here and 1,842 of the 1,932 Blacksmith ones, and 337 recipes nest deeper.

Only 3 of those crystals go into the final step; the other 53 are burned by the intermediates, so the real crystal cost is 38 Fire Crystal, 5 Earth Crystal, 5 Water Crystal and 3 other kinds.

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

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

Of the intermediates, Titanium Nugget has the widest use: 112 recipes call for it, spanning six of the eight crafting classes.