Doman Iron Mortar

Taken all the way down to base materials, one Doman Iron Mortar is 2 crafting steps deep and needs 2 intermediates — Oroshigane Ingot ×2 and Pine Lumber ×1 — which resolve to 3 distinct raw materials totalling 14 units, plus 20 crystals.

That bill outweighs 6,557 of the 13,602 recipes tracked here and 699 of the 1,932 Blacksmith ones, and 4,464 recipes nest deeper.

Only 8 of those crystals go into the final step; the other 12 are burned by the intermediates, so the real crystal cost is 12 Fire Crystal, 4 Earth Crystal and 4 Wind Crystal.

The chain crosses two disciplines — Blacksmith to Lv 65 and Carpenter to Lv 64 — 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.

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