Atrociraptorskin Boots of Healing

Taken all the way down to base materials, one Atrociraptorskin Boots of Healing is 2 crafting steps deep and needs 5 intermediates — Atrociraptor Leather ×3, Darksteel Nugget ×1, Grade 1 Mind Alkahest ×1 and 2 others — which resolve to 8 distinct raw materials totalling 27 units, plus 47 crystals.

That bill outweighs 9,763 of the 13,602 recipes tracked here and 1,384 of the 1,844 Leatherworker ones, and 4,464 recipes nest deeper.

Only 13 of those crystals go into the final step; the other 34 are burned by the intermediates, so the real crystal cost is 28 Earth Crystal, 6 Water Crystal, 6 Wind Crystal and 3 other kinds.

The chain crosses four disciplines — Leatherworker to Lv 74, Weaver to Lv 74, Alchemist to Lv 73 and Blacksmith to Lv 50 — so no single class can finish it unaided.

6 of the 8 raw materials come out of the ground, and one of them is time-gated: Darksteel Ore (1:00). That window comes round once per Eorzean day, every 70 real-world minutes.

Of the intermediates, Rubber has the widest use: 191 recipes call for it, spanning four of the eight crafting classes.