Walnut Spinning Wheel

Taken all the way down to base materials, one Walnut Spinning Wheel is 3 crafting steps deep and needs 3 intermediates — Steel Rivets ×2, Walnut Lumber ×2 and Steel Ingot ×2 — which resolve to 3 distinct raw materials totalling 12 units, plus 21 crystals.

That bill outweighs 6,221 of the 13,602 recipes tracked here and 602 of the 1,552 Carpenter ones, and 337 recipes nest deeper.

Only 7 of those crystals go into the final step; the other 14 are burned by the intermediates, so the real crystal cost is 10 Fire Shard, 8 Wind Shard and 3 Ice Shard.

The chain crosses two disciplines — Carpenter to Lv 33 and Blacksmith to Lv 29 — so no single class can finish it unaided.

All 3 raw materials are gathered, and not one of their spots is timed, so nothing in the tree waits on the Eorzean clock.

Of the intermediates, Walnut Lumber has the widest use: 128 recipes call for it, spanning eight of the eight crafting classes.