Mythrite Ingot

Taken all the way down to base materials, one Mythrite Ingot is 2 crafting steps deep and needs 1 intermediate — Mythrite Nugget ×1 — which resolves to 3 distinct raw materials totalling 10 units, plus 6 crystals.

That bill outweighs 5,754 of the 13,602 recipes tracked here and 647 of the 1,932 Blacksmith ones, and 4,464 recipes nest deeper.

Only 3 of those crystals go into the final step; the other 3 are burned by the intermediates, so the real crystal cost is 6 Fire Crystal.

Every step is Blacksmith work, from a Lv 51 intermediate up to the Lv 52 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.

Mythrite Ingot is itself consumed by 81 further recipes, spanning six of the eight crafting classes.