Brass Bastard Sword

Taken all the way down to base materials, one Brass Bastard Sword is 3 crafting steps deep and needs 4 intermediates — Brass Ingot ×2, Bronze Bastard Sword ×1, Bronze Ingot ×1 and 1 other — which resolve to 5 distinct raw materials totalling 13 units, plus 8 crystals.

That bill outweighs 6,426 of the 13,602 recipes tracked here and 695 of the 1,932 Blacksmith ones, and 337 recipes nest deeper.

Only 2 of those crystals go into the final step; the other 6 are burned by the intermediates, so the real crystal cost is 3 Fire Shard, 3 Wind Shard and 2 Earth Shard.

The chain crosses three disciplines — Blacksmith to Lv 16, Goldsmith to Lv 14 and Carpenter to Lv 1 — so no single class can finish it unaided.

All 5 raw materials are gathered, and not one of their spots is timed, so nothing in the tree waits on the Eorzean clock.

Brass Bastard Sword is itself consumed by 1 further recipe, all of them Blacksmith recipes.