Adamantite File

Taken all the way down to base materials, one Adamantite File is 2 crafting steps deep and needs 2 intermediates — Adamantite Nugget ×2 and Dragon Leather ×1 — which resolve to 4 distinct raw materials totalling 16 units, plus 25 crystals.

That bill outweighs 6,959 of the 13,602 recipes tracked here and 750 of the 1,932 Blacksmith 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 15 Fire Crystal and 10 Earth Crystal.

The chain crosses two disciplines — Blacksmith to Lv 59 and Leatherworker to Lv 56 — so no single class can finish it unaided.

3 of the 4 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, Adamantite Nugget has the widest use: 79 recipes call for it, spanning six of the eight crafting classes.