Titanium Nugget

Nothing in this list is craftable in turn, so one Titanium Nugget is a single step: 7 units of material drawn from 3 base items, plus 4 crystals.

That bill outweighs 4,963 of the 13,602 recipes tracked here and 507 of the 1,932 Blacksmith ones, and 9,374 recipes nest deeper.

All 3 raw materials are gathered, and not one of their spots is timed, so nothing in the tree waits on the Eorzean clock.

Titanium Nugget is itself consumed by 112 further recipes, spanning six of the eight crafting classes.