Rarefied Archaeoskin Belt

Taken all the way down to base materials, one Rarefied Archaeoskin Belt is 2 crafting steps deep and needs 2 intermediates — Archaeornis Leather ×3 and Rainbow Thread ×1 — which resolve to 4 distinct raw materials totalling 17 units, plus 13 crystals.

That bill outweighs 7,161 of the 13,602 recipes tracked here and 892 of the 1,844 Leatherworker ones, and 4,464 recipes nest deeper.

Only 3 of those crystals go into the final step; the other 10 are burned by the intermediates, so the real crystal cost is 11 Earth Crystal, 1 Lightning Crystal and 1 Wind Crystal.

The chain crosses two disciplines — Leatherworker to Lv 51 and Weaver to Lv 51 — so no single class can finish it unaided.

One intermediate outranks the result: Archaeornis Leather is a Lv 51 Leatherworker recipe feeding a Lv 50 craft, so that step, not the last one, is the real gate.

3 of the 4 raw materials come out of the ground, and one of them is time-gated: Coerthan Tea Leaves (0:00, 8:00, 10:00, 12:00, 20:00, 22:00). The widest gap between consecutive opening times is 8 Eorzean hours, about 23 real-world minutes.