Diadochos Gunblade ★★★★

Taken all the way down to base materials, one Diadochos Gunblade is 2 crafting steps deep and needs 4 intermediates — Softsilver Ingot ×4, Grade 8 Vitality Alkahest ×2, Ophiotauros Leather ×1 and 1 other — which resolve to 10 distinct raw materials totalling 46 units, plus 50 crystals.

That bill outweighs 12,540 of the 13,602 recipes tracked here and 1,675 of the 1,932 Blacksmith ones, and 4,464 recipes nest deeper.

Only 6 of those crystals go into the final step; the other 44 are burned by the intermediates, so the real crystal cost is 18 Fire Cluster, 15 Earth Cluster, 8 Earth Crystal and 3 other kinds.

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

5 of the 10 raw materials come out of the ground, and 3 of them are time-gated: Lovingbloom (0:00, 12:00), Raw Spodumene (8:00, 20:00) and 1 other. The widest gap between consecutive opening times is 4 Eorzean hours, about 12 real-world minutes.

Of the intermediates, Ophiotauros Leather has the widest use: 153 recipes call for it, spanning seven of the eight crafting classes.