Clinker Bricks

Nothing in this list is craftable in turn, so one Clinker Bricks is a single step: 4 units of material drawn from 3 base items, plus 5 crystals.

That bill outweighs 3,935 of the 13,602 recipes tracked here and 746 of the 1,591 Alchemist 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.

Clinker Bricks is itself consumed by 19 further recipes, spanning five of the eight crafting classes.