Black Willow Necklace of Crafting ★★★

Taken all the way down to base materials, one Black Willow Necklace of Crafting is 3 crafting steps deep and needs 4 intermediates — Black Willow Lumber ×4, Hawk's Eye Sand ×1, Varnish ×1 and 1 other — which resolve to 9 distinct raw materials totalling 25 units, plus 24 crystals.

That bill outweighs 9,313 of the 13,602 recipes tracked here and 963 of the 1,552 Carpenter ones, and 337 recipes nest deeper.

Only 4 of those crystals go into the final step; the other 20 are burned by the intermediates, so the real crystal cost is 8 Water Shard, 6 Ice Cluster, 6 Wind Cluster and 2 other kinds.

The chain crosses two disciplines — Carpenter to Lv 70 and Alchemist to Lv 70 — so no single class can finish it unaided.

4 of the 9 raw materials come out of the ground, and 2 of them are time-gated: Black Willow Log (4:00, 16:00) and Hawk's Eye (6:00, 18:00). The widest gap between consecutive opening times is 10 Eorzean hours, about 29 real-world minutes.

Of the intermediates, Varnish has the widest use: 114 recipes call for it, spanning four of the eight crafting classes.