Doman Steel Mortar

Taken all the way down to base materials, one Doman Steel Mortar is 3 crafting steps deep and needs 3 intermediates — Tama-hagane Ingot ×2, Persimmon Lumber ×1 and Oroshigane Ingot ×2 — which resolve to 4 distinct raw materials totalling 22 units, plus 32 crystals.

That bill outweighs 8,402 of the 13,602 recipes tracked here and 917 of the 1,932 Blacksmith ones, and 337 recipes nest deeper.

Only 9 of those crystals go into the final step; the other 23 are burned by the intermediates, so the real crystal cost is 23 Fire Crystal, 5 Wind Crystal and 4 Earth Crystal.

The chain crosses two disciplines — Blacksmith to Lv 67 and Carpenter to Lv 66 — so no single class can finish it unaided.

All 4 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, Oroshigane Ingot has the widest use: 114 recipes call for it, spanning six of the eight crafting classes.