High Steel Uchigatana

Taken all the way down to base materials, one High Steel Uchigatana is 3 crafting steps deep and needs 7 intermediates — High Steel Ingot ×3, Bloodhempen Cloth ×1, Larch Lumber ×1 and 4 others — which resolve to 8 distinct raw materials totalling 45 units, plus 38 crystals.

That bill outweighs 12,451 of the 13,602 recipes tracked here and 1,645 of the 1,932 Blacksmith ones, and 337 recipes nest deeper.

Only 7 of those crystals go into the final step; the other 31 are burned by the intermediates, so the real crystal cost is 26 Fire Crystal, 6 Wind Crystal, 3 Earth Crystal and 1 other kind.

The chain crosses four disciplines — Blacksmith to Lv 63, Carpenter to Lv 62, Goldsmith to Lv 61 and Weaver to Lv 61 — 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, High Steel Nugget has the widest use: 133 recipes call for it, spanning seven of the eight crafting classes.