Cobalt-barreled Musketoon

Taken all the way down to base materials, one Cobalt-barreled Musketoon is 2 crafting steps deep and needs 4 intermediates — Cobalt Ingot ×2, Black Firesand ×1, Electrum Ingot ×1 and 1 other — which resolve to 8 distinct raw materials totalling 21 units, plus 36 crystals.

That bill outweighs 8,152 of the 13,602 recipes tracked here and 874 of the 1,932 Blacksmith ones, and 4,464 recipes nest deeper.

Only 12 of those crystals go into the final step; the other 24 are burned by the intermediates, so the real crystal cost is 16 Fire Shard, 11 Wind Shard, 6 Earth Shard and 1 other kind.

The chain crosses four disciplines — Blacksmith to Lv 48, Carpenter to Lv 45, Goldsmith to Lv 42 and Alchemist to Lv 32 — 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, Electrum Ingot has the widest use: 234 recipes call for it, spanning seven of the eight crafting classes.