Durium Nugget

Nothing in this list is craftable in turn, so one Durium Nugget is a single step: 5 units of material drawn from 2 base items, plus 4 crystals.

That bill outweighs 4,201 of the 13,602 recipes tracked here and 564 of the 2,216 Goldsmith ones, and 9,374 recipes nest deeper.

Both raw materials are gathered, and no spot for either is timed, so nothing in the tree waits on the Eorzean clock.

Durium Nugget is itself consumed by 142 further recipes, spanning seven of the eight crafting classes.