Adamantite-barreled Culverin

Taken all the way down to base materials, one Adamantite-barreled Culverin is 3 crafting steps deep and needs 6 intermediates — Adamantite Nugget ×3, Birch Lumber ×2, Adamantite Rivets ×1 and 3 others — which resolve to 10 distinct raw materials totalling 48 units, plus 45 crystals.

That bill outweighs 12,691 of the 13,602 recipes tracked here and 1,712 of the 1,932 Blacksmith ones, and 337 recipes nest deeper.

Only 3 of those crystals go into the final step; the other 42 are burned by the intermediates, so the real crystal cost is 20 Fire Crystal, 19 Wind Crystal, 3 Water Shard and 2 other kinds.

The chain crosses four disciplines — Blacksmith to Lv 60, Carpenter to Lv 58, Goldsmith to Lv 56 and Alchemist to Lv 32 — so no single class can finish it unaided.

All 10 raw materials are gathered, and 2 of them are time-gated: Adamantite Ore (0:00, 2:00, 6:00, 10:00, 12:00, 14:00, 18:00, 22:00) and Darksteel Ore (1:00). The widest gap between consecutive opening times is 4 Eorzean hours, about 12 real-world minutes.

Of the intermediates, Hardsilver Ingot has the widest use: 117 recipes call for it, spanning seven of the eight crafting classes.