Rakshasa Blade ★★★★

Taken all the way down to base materials, one Rakshasa Blade is 4 crafting steps deep and needs 4 intermediates — Chigusa Ingot ×2, Grade 4 Reisui of Vitality ×2, Tama-hagane Ingot ×1 and 1 other — which resolve to 9 distinct raw materials totalling 25 units, plus 25 crystals.

That bill outweighs 9,313 of the 13,602 recipes tracked here and 1,056 of the 1,932 Blacksmith ones, and 1 recipe nests deeper.

Only 4 of those crystals go into the final step; the other 21 are burned by the intermediates, so the real crystal cost is 13 Fire Crystal, 4 Earth Cluster, 4 Fire Cluster and 2 other kinds.

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

6 of the 9 raw materials come out of the ground, and 2 of them are time-gated: Azim Spring Water (8:00, 20:00) and Gyr Abanian Ore (0:00, 12:00). The widest gap between consecutive opening times is 8 Eorzean hours, about 23 real-world minutes.

Of the intermediates, Oroshigane Ingot has the widest use: 114 recipes call for it, spanning six of the eight crafting classes.