Heavy Metal Longsword ★★★★

Taken all the way down to base materials, one Heavy Metal Longsword is 3 crafting steps deep and needs 5 intermediates — Heavy Metal Ingot ×2, Saurian Leather ×1, Scintillant Ingot ×1 and 2 others — which resolve to 13 distinct raw materials totalling 47 units, plus 43 crystals.

That bill outweighs 12,643 of the 13,602 recipes tracked here and 1,700 of the 1,932 Blacksmith ones, and 337 recipes nest deeper.

Only 6 of those crystals go into the final step; the other 37 are burned by the intermediates, so the real crystal cost is 22 Fire Cluster, 15 Earth Cluster and 6 Wind Cluster.

The chain crosses three disciplines — Blacksmith to Lv 60, Goldsmith to Lv 60 and Leatherworker to Lv 50 — so no single class can finish it unaided.

6 of the 13 raw materials come out of the ground, and 5 of them are time-gated: Luminium Ore (6:00, 18:00), Tungstite (2:00, 14:00) and 3 others. The widest gap between consecutive opening times is 8 Eorzean hours, about 23 real-world minutes.

Of the intermediates, Platinum Ingot has the widest use: 176 recipes call for it, spanning seven of the eight crafting classes.