Nightsteel Ingot ★★★

Taken all the way down to base materials, a batch of 2 Nightsteel Ingot is 3 crafting steps deep and needs 2 intermediates — High Steel Ingot ×1 and High Steel Nugget ×1 — which resolve to 5 distinct raw materials totalling 15 units, plus 10 crystals.

That bill outweighs 6,735 of the 13,602 recipes tracked here and 730 of the 1,932 Blacksmith ones, and 337 recipes nest deeper.

Only 4 of those crystals go into the final step; the other 6 are burned by the intermediates, so the real crystal cost is 6 Fire Crystal, 2 Earth Cluster and 2 Fire Cluster.

Every step is Blacksmith work, from a Lv 61 intermediate up to the Lv 70 finish, so one class covers the whole chain.

4 of the 5 raw materials come out of the ground, and one of them is time-gated: Nightsteel Ore (6:00, 18:00). The widest gap between consecutive opening times is 12 Eorzean hours, about 35 real-world minutes.

Nightsteel Ingot is itself consumed by 41 further recipes, spanning six of the eight crafting classes.