Astral Birch Spinning Wheel ★★

Taken all the way down to base materials, one Astral Birch Spinning Wheel is 3 crafting steps deep and needs 5 intermediates — Adamantite Rivets ×3, Astral Birch Lumber ×3, Adamantite Nugget ×3 and 2 others — which resolve to 9 distinct raw materials totalling 43 units, plus 51 crystals.

That bill outweighs 12,178 of the 13,602 recipes tracked here and 1,293 of the 1,552 Carpenter ones, and 337 recipes nest deeper.

Only 4 of those crystals go into the final step; the other 47 are burned by the intermediates, so the real crystal cost is 30 Fire Crystal, 10 Wind Crystal, 4 Ice Cluster and 3 other kinds.

The chain crosses three disciplines — Carpenter to Lv 60, Alchemist to Lv 60 and Blacksmith to Lv 58 — so no single class can finish it unaided.

5 of the 9 raw materials come out of the ground, and 4 of them are time-gated: Adamantite Ore (0:00, 2:00, 6:00, 10:00, 12:00, 14:00, 18:00, 22:00), Astral Moraine (0:00, 12:00) and 2 others. The widest gap between consecutive opening times is 4 Eorzean hours, about 12 real-world minutes.

Of the intermediates, Adamantite Nugget has the widest use: 79 recipes call for it, spanning six of the eight crafting classes.