Paladin's Rubellux Arms ★★

Taken all the way down to base materials, one Paladin's Rubellux Arms is 3 crafting steps deep and needs 4 intermediates — Tungsten Steel Ingot ×3, Alumina Whetstone ×2, Onyx ×1 and 1 other — which resolve to 9 distinct raw materials totalling 43 units, plus 38 crystals.

That bill outweighs 12,178 of the 13,602 recipes tracked here and 1,542 of the 1,932 Blacksmith ones, and 337 recipes nest deeper.

Only 4 of those crystals go into the final step; the other 34 are burned by the intermediates, so the real crystal cost is 14 Wind Crystal, 12 Fire Cluster, 8 Earth Cluster and 1 other kind.

The chain crosses two disciplines — Blacksmith to Lv 80 and Goldsmith to Lv 80 — so no single class can finish it unaided.

4 of the 9 raw materials come out of the ground, and 3 of them are time-gated: Beryllium Ore (4:00, 16:00), Raw Onyx (0:00, 12:00) and 1 other. The widest gap between consecutive opening times is 6 Eorzean hours, about 18 real-world minutes.

Of the intermediates, Tungsten Steel Ingot has the widest use: 113 recipes call for it, spanning six of the eight crafting classes.