Exarchic Circlet of Healing ★★★★

Taken all the way down to base materials, one Exarchic Circlet of Healing is 2 crafting steps deep and needs 4 intermediates — Grade 4 Mind Alkahest ×2, Solstice Ingot ×2, Dwarven Mythril Nugget ×1 and 1 other — which resolve to 10 distinct raw materials totalling 30 units, plus 37 crystals.

That bill outweighs 10,368 of the 13,602 recipes tracked here and 1,694 of the 2,216 Goldsmith ones, and 4,464 recipes nest deeper.

Only 6 of those crystals go into the final step; the other 31 are burned by the intermediates, so the real crystal cost is 12 Wind Cluster, 9 Fire Cluster, 7 Wind Crystal and 2 other kinds.

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

6 of the 10 raw materials come out of the ground, and 3 of them are time-gated: Hard Water (4:00, 16:00), Raindrop Cotton Boll (10:00, 22:00) and 1 other. The widest gap between consecutive opening times is 6 Eorzean hours, about 18 real-world minutes.

Of the intermediates, Dwarven Mythril Nugget has the widest use: 154 recipes call for it, spanning seven of the eight crafting classes.