Bismuth Blunderbuss

Taken all the way down to base materials, one Bismuth Blunderbuss is 2 crafting steps deep and needs 4 intermediates — Bismuth Ingot ×2, Phrygian Gold Ingot ×2, Crimson Firesand ×1 and 1 other — which resolve to 8 distinct raw materials totalling 36 units, plus 61 crystals.

That bill outweighs 11,383 of the 13,602 recipes tracked here and 1,369 of the 1,932 Blacksmith ones, and 4,464 recipes nest deeper.

Only 15 of those crystals go into the final step; the other 46 are burned by the intermediates, so the real crystal cost is 24 Fire Crystal, 24 Wind Crystal, 7 Earth Crystal and 1 other kind.

The chain crosses four disciplines — Blacksmith to Lv 84, Goldsmith to Lv 84, Carpenter to Lv 82 and Alchemist to Lv 71 — so no single class can finish it unaided.

All 8 raw materials are gathered, and not one of their spots is timed, so nothing in the tree waits on the Eorzean clock.

Of the intermediates, Bismuth Ingot has the widest use: 104 recipes call for it, spanning six of the eight crafting classes.