Diadochos Headband of Scouting ★★★★

Taken all the way down to base materials, one Diadochos Headband of Scouting is 2 crafting steps deep and needs 4 intermediates — Deinosuchus Leather ×2, Grade 8 Dexterity Alkahest ×2, Garnet Cotton ×1 and 1 other — which resolve to 10 distinct raw materials totalling 31 units, plus 38 crystals.

That bill outweighs 10,578 of the 13,602 recipes tracked here and 1,562 of the 1,844 Leatherworker ones, and 4,464 recipes nest deeper.

Only 6 of those crystals go into the final step; the other 32 are burned by the intermediates, so the real crystal cost is 12 Wind Cluster, 9 Earth Cluster, 8 Earth Crystal and 2 other kinds.

The chain crosses three disciplines — Leatherworker to Lv 90, Alchemist to Lv 90 and Weaver 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.