Mahogany Aqueduct

Taken all the way down to base materials, one Mahogany Aqueduct is 2 crafting steps deep and needs 2 intermediates — Mahogany Lumber ×6 and Lignum Vitae Lumber ×4 — which resolve to 3 distinct raw materials totalling 39 units, plus 72 crystals.

That bill outweighs 11,756 of the 13,602 recipes tracked here and 1,225 of the 1,552 Carpenter ones, and 4,464 recipes nest deeper.

Only 14 of those crystals go into the final step; the other 58 are burned by the intermediates, so the real crystal cost is 35 Wind Crystal, 30 Wind Shard and 7 Ice Crystal.

Every step is Carpenter work, from a Lv 39 intermediate up to the Lv 80 finish, so one class covers the whole chain.

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, Lignum Vitae Lumber has the widest use: 134 recipes call for it, spanning seven of the eight crafting classes.