Sky Rat Harness of Casting ★★★★

Taken all the way down to base materials, one Sky Rat Harness of Casting is 3 crafting steps deep and needs 6 intermediates — Grade 2 Intelligence Dissolvent ×2, Peteinosaur Leather ×2, Griffin Leather Strap ×1 and 3 others — which resolve to 10 distinct raw materials totalling 23 units, plus 57 crystals.

That bill outweighs 8,647 of the 13,602 recipes tracked here and 1,208 of the 1,844 Leatherworker ones, and 337 recipes nest deeper.

Only 6 of those crystals go into the final step; the other 51 are burned by the intermediates, so the real crystal cost is 14 Earth Crystal, 9 Earth Cluster, 9 Wind Cluster and 4 other kinds.

The chain crosses four disciplines — Leatherworker to Lv 60, Alchemist to Lv 60, Blacksmith to Lv 60 and Weaver to Lv 60 — 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: Chysahl Greens (0:00, 4:00, 8:00, 12:00, 16:00, 20:00), Stormcloud Cotton Boll (0:00, 4:00, 8:00, 12:00, 16:00, 20:00) and 1 other. The widest gap between consecutive opening times is 4 Eorzean hours, about 12 real-world minutes.

Of the intermediates, Griffin Leather Strap has the widest use: 38 recipes call for it, spanning four of the eight crafting classes.