Garnet Grinding Wheel

Taken all the way down to base materials, one Garnet Grinding Wheel is 2 crafting steps deep and needs 2 intermediates — Mahogany Lumber ×1 and Mythril Ingot ×1 — which resolve to 3 distinct raw materials totalling 7 units, plus 19 crystals.

That bill outweighs 4,963 of the 13,602 recipes tracked here and 509 of the 1,552 Carpenter ones, and 4,464 recipes nest deeper.

Only 10 of those crystals go into the final step; the other 9 are burned by the intermediates, so the real crystal cost is 10 Wind Shard, 5 Ice Shard and 4 Fire Shard.

The chain crosses two disciplines — Carpenter to Lv 43 and Blacksmith to Lv 38 — 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, Mythril Ingot has the widest use: 135 recipes call for it, spanning seven of the eight crafting classes.