Diadochos Jacket of Fending ★★★★

Taken all the way down to base materials, one Diadochos Jacket of Fending is 2 crafting steps deep and needs 4 intermediates — Deinosuchus Leather ×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 1,807 of the 1,844 Leatherworker 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 Earth Cluster, 15 Wind Cluster, 8 Earth Crystal and 3 other kinds.

The chain crosses three disciplines — Leatherworker to Lv 90, Alchemist to Lv 90 and Blacksmith to Lv 90 — 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: Field Mustard (10:00, 22:00), Lovingbloom (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, Ophiotauros Leather has the widest use: 153 recipes call for it, spanning seven of the eight crafting classes.