Stonegold Rapier

Taken all the way down to base materials, one Stonegold Rapier is 2 crafting steps deep and needs 4 intermediates — Stonegold Ingot ×3, Cobalt Ingot ×1, Deepgold Ingot ×1 and 1 other — which resolve to 6 distinct raw materials totalling 27 units, plus 46 crystals.

That bill outweighs 9,763 of the 13,602 recipes tracked here and 1,605 of the 2,216 Goldsmith ones, and 4,464 recipes nest deeper.

Only 12 of those crystals go into the final step; the other 34 are burned by the intermediates, so the real crystal cost is 24 Wind Crystal, 12 Fire Crystal, 5 Fire Shard and 1 other kind.

The chain crosses two disciplines — Goldsmith to Lv 73 and Blacksmith to Lv 72 — so no single class can finish it unaided.

All 6 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, Electrum Ingot has the widest use: 234 recipes call for it, spanning seven of the eight crafting classes.