Doman Iron Alembic

Taken all the way down to base materials, one Doman Iron Alembic is 2 crafting steps deep and needs 3 intermediates — Oroshigane Ingot ×3, Durium Nugget ×1 and High Steel Nugget ×1 — which resolve to 5 distinct raw materials totalling 25 units, plus 27 crystals.

That bill outweighs 9,313 of the 13,602 recipes tracked here and 922 of the 1,441 Armorer ones, and 4,464 recipes nest deeper.

Only 8 of those crystals go into the final step; the other 19 are burned by the intermediates, so the real crystal cost is 15 Fire Crystal, 4 Earth Crystal, 4 Ice Crystal and 1 other kind.

The chain crosses three disciplines — Armorer to Lv 65, Blacksmith to Lv 64 and Goldsmith to Lv 64 — 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.

Of the intermediates, Durium Nugget has the widest use: 142 recipes call for it, spanning seven of the eight crafting classes.