Mahogany Spinning Wheel

Taken all the way down to base materials, one Mahogany Spinning Wheel is 3 crafting steps deep and needs 3 intermediates — Mahogany Lumber ×2, Mythril Rivets ×2 and Mythril Ingot ×2 — which resolve to 2 distinct raw materials totalling 12 units, plus 37 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 9 of those crystals go into the final step; the other 28 are burned by the intermediates, so the real crystal cost is 18 Fire Shard, 15 Wind Shard and 4 Ice Shard.

The chain crosses two disciplines — Carpenter to Lv 40 and Blacksmith to Lv 39 — so no single class can finish it unaided.

Both raw materials are gathered, and no spot for either is timed, so nothing in the tree waits on the Eorzean clock.

Of the intermediates, Mythril Ingot has the widest use: 135 recipes call for it, spanning seven of the eight crafting classes.