Iron Head Knife

Taken all the way down to base materials, one Iron Head Knife is 2 crafting steps deep and needs 3 intermediates — Iron Ingot ×1, Mudstone Whetstone ×1 and Walnut Lumber ×1 — which resolve to 3 distinct raw materials totalling 8 units, plus 9 crystals.

That bill outweighs 5,254 of the 13,602 recipes tracked here and 529 of the 1,932 Blacksmith ones, and 4,464 recipes nest deeper.

Only 5 of those crystals go into the final step; the other 4 are burned by the intermediates, so the real crystal cost is 4 Fire Shard, 3 Wind Shard and 2 Earth Shard.

The chain crosses three disciplines — Blacksmith to Lv 29, Carpenter to Lv 25 and Goldsmith to Lv 20 — so no single class can finish it unaided.

All 3 raw materials are gathered, and not one of their spots is timed, so nothing in the tree waits on the Eorzean clock.

Iron Head Knife is itself consumed by 1 further recipe, all of them Blacksmith recipes.