Diagnostics Module ★★

Taken all the way down to base materials, one Diagnostics Module is 3 crafting steps deep and needs 5 intermediates — Rose Gold Nugget ×6, Clear Glass Lens ×2, Darksteel Ingot ×1 and 2 others — which resolve to 8 distinct raw materials totalling 46 units, plus 37 crystals.

That bill outweighs 12,540 of the 13,602 recipes tracked here and 1,324 of the 1,441 Armorer ones, and 337 recipes nest deeper.

Only 2 of those crystals go into the final step; the other 35 are burned by the intermediates, so the real crystal cost is 18 Wind Crystal, 10 Water Shard, 6 Fire Crystal and 3 other kinds.

The chain crosses four disciplines — Armorer to Lv 50, Blacksmith to Lv 50, Goldsmith to Lv 50 and Alchemist to Lv 28 — so no single class can finish it unaided.

6 of the 8 raw materials come out of the ground, and 2 of them are time-gated: Darksteel Ore (1:00) and Gold Ore (9:00). The widest gap between consecutive opening times is 16 Eorzean hours, about 47 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.