Adamantite Scutum

Taken all the way down to base materials, one Adamantite Scutum is 3 crafting steps deep and needs 5 intermediates — Adamantite Nugget ×2, Titanium Ingot ×2, Amphiptere Leather ×1 and 2 others — which resolve to 10 distinct raw materials totalling 42 units, plus 46 crystals.

That bill outweighs 12,044 of the 13,602 recipes tracked here and 1,279 of the 1,441 Armorer ones, and 337 recipes nest deeper.

Only 10 of those crystals go into the final step; the other 36 are burned by the intermediates, so the real crystal cost is 28 Fire Crystal, 10 Earth Crystal, 5 Ice Crystal and 1 other kind.

The chain crosses four disciplines — Armorer to Lv 59, Blacksmith to Lv 58, Leatherworker to Lv 58 and Goldsmith to Lv 50 — so no single class can finish it unaided.

9 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, Rose Gold Nugget has the widest use: 179 recipes call for it, spanning seven of the eight crafting classes.