Hemiskin Open-toed Boots of Casting ★★★★

Taken all the way down to base materials, one Hemiskin Open-toed Boots of Casting is 3 crafting steps deep and needs 6 intermediates — Grade 3 Intelligence Dissolvent ×2, Hemicyon Leather ×2, Griffin Leather Strap ×1 and 3 others — which resolve to 14 distinct raw materials totalling 37 units, plus 55 crystals.

That bill outweighs 11,564 of the 13,602 recipes tracked here and 1,713 of the 1,844 Leatherworker ones, and 337 recipes nest deeper.

Only 6 of those crystals go into the final step; the other 49 are burned by the intermediates, so the real crystal cost is 14 Wind Cluster, 10 Lightning Cluster, 9 Earth Cluster and 4 other kinds.

The chain crosses four disciplines — Leatherworker to Lv 60, Alchemist to Lv 60, Weaver to Lv 60 and Goldsmith to Lv 50 — so no single class can finish it unaided.

7 of the 14 raw materials come out of the ground, and 5 of them are time-gated: Chysahl Greens (0:00, 4:00, 8:00, 12:00, 16:00, 20:00), Star Cotton Boll (4:00, 16:00) and 3 others. The widest gap between consecutive opening times is 4 Eorzean hours, about 12 real-world minutes.

Of the intermediates, Star Velvet has the widest use: 41 recipes call for it, spanning five of the eight crafting classes.