Mythrite Nugget

Nothing in this list is craftable in turn, so one Mythrite Nugget is a single step: 6 units of material drawn from 2 base items, plus 3 crystals.

That bill outweighs 4,542 of the 13,602 recipes tracked here and 643 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.

Mythrite Nugget is itself consumed by 102 further recipes, spanning seven of the eight crafting classes.