Dwarven Mythril Milpreves

Taken all the way down to base materials, one Dwarven Mythril Milpreves is 3 crafting steps deep and needs 4 intermediates — Dwarven Mythril Ingot ×2, Dwarven Mythril Nugget ×2, Triplite ×1 and 1 other — which resolve to 6 distinct raw materials totalling 29 units, plus 63 crystals.

That bill outweighs 10,170 of the 13,602 recipes tracked here and 1,665 of the 2,216 Goldsmith ones, and 337 recipes nest deeper.

Only 14 of those crystals go into the final step; the other 49 are burned by the intermediates, so the real crystal cost is 42 Wind Crystal and 21 Fire Crystal.

The chain crosses two disciplines — Goldsmith to Lv 78 and Blacksmith to Lv 78 — so no single class can finish it unaided.

All 6 raw materials are gathered, and one of them is time-gated: Raw Triplite (0:00, 12:00). The widest gap between consecutive opening times is 12 Eorzean hours, about 35 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.