Double Duraluminum Ingot ★★★★

Nothing in this list is craftable in turn, so one Double Duraluminum Ingot is a single step: 6 units of material drawn from 2 base items, plus 6 crystals.

That bill outweighs 4,542 of the 13,602 recipes tracked here and 467 of the 1,932 Blacksmith ones, and 9,374 recipes nest deeper.

1 of the 2 raw materials come out of the ground, and one of them is time-gated: Dense Aluminum Ore (10:00, 22:00). The widest gap between consecutive opening times is 12 Eorzean hours, about 35 real-world minutes.

Double Duraluminum Ingot is itself consumed by 40 further recipes, spanning five of the eight crafting classes.