Neo-Ishgardian Trident ★★★

Taken all the way down to base materials, one Neo-Ishgardian Trident is 2 crafting steps deep and needs 4 intermediates — Cobalt Alloy Ingot ×2, Grade 3 Strength Alkahest ×2, Merbau Lumber ×2 and 1 other — which resolve to 11 distinct raw materials totalling 36 units, plus 31 crystals.

That bill outweighs 11,383 of the 13,602 recipes tracked here and 1,369 of the 1,932 Blacksmith ones, and 4,464 recipes nest deeper.

Only 4 of those crystals go into the final step; the other 27 are burned by the intermediates, so the real crystal cost is 7 Fire Crystal, 6 Earth Cluster, 6 Fire Cluster and 4 other kinds.

The chain crosses three disciplines — Blacksmith to Lv 80, Alchemist to Lv 80 and Carpenter to Lv 80 — so no single class can finish it unaided.

6 of the 11 raw materials come out of the ground, and 3 of them are time-gated: Fireheart Cobalt (2:00, 14:00), Imperial Fern (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, Dwarven Mythril Ingot has the widest use: 168 recipes call for it, spanning seven of the eight crafting classes.