Mythrite-barreled Arquebus

Taken all the way down to base materials, one Mythrite-barreled Arquebus is 3 crafting steps deep and needs 5 intermediates — Mythrite Nugget ×3, Cedar Lumber ×2, Darksteel Nugget ×2 and 2 others — which resolve to 8 distinct raw materials totalling 44 units, plus 32 crystals.

That bill outweighs 12,337 of the 13,602 recipes tracked here and 1,595 of the 1,932 Blacksmith ones, and 337 recipes nest deeper.

Only 5 of those crystals go into the final step; the other 27 are burned by the intermediates, so the real crystal cost is 21 Fire Crystal, 6 Wind Crystal, 3 Water Shard and 1 other kind.

The chain crosses three disciplines — Blacksmith to Lv 51, Carpenter to Lv 51 and Alchemist to Lv 32 — so no single class can finish it unaided.

All 8 raw materials are gathered, and one of them 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.