Chigusa Ingot ★★★★

Taken all the way down to base materials, a batch of 2 Chigusa Ingot is 3 crafting steps deep and needs 2 intermediates — Tama-hagane Ingot ×1 and Oroshigane Ingot ×1 — which resolve to 5 distinct raw materials totalling 15 units, plus 13 crystals.

That bill outweighs 6,735 of the 13,602 recipes tracked here and 616 of the 1,441 Armorer ones, and 337 recipes nest deeper.

Only 4 of those crystals go into the final step; the other 9 are burned by the intermediates, so the real crystal cost is 9 Fire Crystal, 2 Earth Cluster and 2 Ice Cluster.

The chain crosses two disciplines — Armorer to Lv 70 and Blacksmith to Lv 66 — so no single class can finish it unaided.

4 of the 5 raw materials come out of the ground, and one of them is time-gated: Gyr Abanian Ore (0:00, 12:00). The widest gap between consecutive opening times is 12 Eorzean hours, about 35 real-world minutes.

Chigusa Ingot is itself consumed by 29 further recipes, spanning five of the eight crafting classes.