Endless Expanse Katana ★★

Taken all the way down to base materials, one Endless Expanse Katana is 2 crafting steps deep and needs 4 intermediates — High Mythrite Ingot ×3, Cloud Mica Whetstone ×1, Eikon Iron Ingot ×1 and 1 other — which resolve to 12 distinct raw materials totalling 45 units, plus 34 crystals.

That bill outweighs 12,451 of the 13,602 recipes tracked here and 1,645 of the 1,932 Blacksmith ones, and 4,464 recipes nest deeper.

Only 4 of those crystals go into the final step; the other 30 are burned by the intermediates, so the real crystal cost is 11 Fire Cluster, 8 Wind Cluster, 6 Earth Cluster and 3 other kinds.

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

6 of the 12 raw materials come out of the ground, and 3 of them are time-gated: Lumythrite Ore (2:00, 14:00), Old-growth Camphorwood Log (8:00, 20:00) and 1 other. The widest gap between consecutive opening times is 6 Eorzean hours, about 18 real-world minutes.

Of the intermediates, High Mythrite Ingot has the widest use: 150 recipes call for it, spanning seven of the eight crafting classes.