Skybuilders' Barrel

Taken all the way down to base materials, one Skybuilders' Barrel is 2 crafting steps deep and needs 1 intermediate — Titanium Nugget ×1 — which resolves to 5 distinct raw materials totalling 19 units, plus 10 crystals.

That bill outweighs 7,589 of the 13,602 recipes tracked here and 777 of the 1,552 Carpenter ones, and 4,464 recipes nest deeper.

Only 6 of those crystals go into the final step; the other 4 are burned by the intermediates, so the real crystal cost is 4 Fire Crystal, 4 Wind Crystal and 2 Ice Crystal.

The chain crosses two disciplines — Carpenter to Lv 60 and Blacksmith to Lv 54 — 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, Titanium Nugget has the widest use: 112 recipes call for it, spanning six of the eight crafting classes.