Ruthenium Ingot

Nothing in this list is craftable in turn, so one Ruthenium Ingot is a single step: 6 units of material drawn from 2 base items, plus 8 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.

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

Ruthenium Ingot is itself consumed by 82 further recipes, spanning six of the eight crafting classes.