Deepgold Gunblade

Taken all the way down to base materials, one Deepgold Gunblade is 2 crafting steps deep and needs 3 intermediates — Deepgold Nugget ×2, Oroshigane Ingot ×2 and Stonegold Nugget ×1 — which resolve to 5 distinct raw materials totalling 25 units, plus 37 crystals.

That bill outweighs 9,313 of the 13,602 recipes tracked here and 1,056 of the 1,932 Blacksmith ones, and 4,464 recipes nest deeper.

Only 11 of those crystals go into the final step; the other 26 are burned by the intermediates, so the real crystal cost is 26 Fire Crystal, 6 Wind Crystal and 5 Earth Crystal.

The chain crosses two disciplines — Blacksmith to Lv 71 and Goldsmith to Lv 71 — so no single class can finish it unaided.

All 5 raw materials are gathered, and one of them is time-gated: Gold Ore (9:00). That window comes round once per Eorzean day, every 70 real-world minutes.

Of the intermediates, Oroshigane Ingot has the widest use: 114 recipes call for it, spanning six of the eight crafting classes.