Voidcast Barding ★★★

Taken all the way down to base materials, one Voidcast Barding is 2 crafting steps deep and needs 3 intermediates — AR-Caean Velvet ×2, Ilmenite Ingot ×2 and Rutilated Quartz ×1 — which resolve to 6 distinct raw materials totalling 32 units, plus 40 crystals.

That bill outweighs 10,750 of the 13,602 recipes tracked here and 1,133 of the 1,441 Armorer ones, and 4,464 recipes nest deeper.

Only 6 of those crystals go into the final step; the other 34 are burned by the intermediates, so the real crystal cost is 16 Lightning Crystal, 9 Earth Cluster, 9 Fire Cluster and 2 other kinds.

The chain crosses four disciplines — Armorer to Lv 90, Blacksmith to Lv 90, Goldsmith to Lv 90 and Weaver to Lv 88 — so no single class can finish it unaided.

3 of the 6 raw materials come out of the ground, and 2 of them are time-gated: Ilmenite (8:00, 20:00) and Raw Rutilated Quartz (6:00, 18:00). The widest gap between consecutive opening times is 10 Eorzean hours, about 29 real-world minutes.

Of the intermediates, AR-Caean Velvet has the widest use: 136 recipes call for it, spanning six of the eight crafting classes.