Wind-up Dullahan

Taken all the way down to base materials, one Wind-up Dullahan is 2 crafting steps deep and needs 1 intermediate — Darksteel Nugget ×3 — which resolves to 1 distinct raw material totalling 9 units, plus 108 crystals.

That bill outweighs 5,492 of the 13,602 recipes tracked here and 519 of the 1,441 Armorer ones, and 4,464 recipes nest deeper.

Only 99 of those crystals go into the final step; the other 9 are burned by the intermediates, so the real crystal cost is 99 Ice Shard and 9 Fire Crystal.

The chain crosses two disciplines — Armorer to Lv 50 and Blacksmith to Lv 50 — so no single class can finish it unaided.

The single raw material is gathered, and it is time-gated: Darksteel Ore (1:00). That window comes round once per Eorzean day, every 70 real-world minutes.

Of the intermediates, Darksteel Nugget has the widest use: 121 recipes call for it, spanning seven of the eight crafting classes.