Titanium Rivets

Taken all the way down to base materials, one Titanium Rivets is 2 crafting steps deep and needs 1 intermediate — Titanium Nugget ×1 — which resolves to 3 distinct raw materials totalling 7 units, plus 8 crystals.

That bill outweighs 4,963 of the 13,602 recipes tracked here and 507 of the 1,932 Blacksmith ones, and 4,464 recipes nest deeper.

Only 4 of those crystals go into the final step; the other 4 are burned by the intermediates, so the real crystal cost is 8 Fire Crystal.

Every step is Blacksmith work, from a Lv 54 intermediate up to the Lv 54 finish, so one class covers the whole chain.

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 Rivets is itself consumed by 50 further recipes, spanning five of the eight crafting classes.