Mythril Scythe

Taken all the way down to base materials, one Mythril Scythe is 2 crafting steps deep and needs 3 intermediates — Basilisk Whetstone ×1, Mahogany Lumber ×1 and Mythril Ingot ×1 — which resolve to 3 distinct raw materials totalling 7 units, plus 23 crystals.

That bill outweighs 4,963 of the 13,602 recipes tracked here and 507 of the 1,932 Blacksmith ones, and 4,464 recipes nest deeper.

Only 9 of those crystals go into the final step; the other 14 are burned by the intermediates, so the real crystal cost is 10 Wind Shard, 9 Fire Shard and 4 Earth Shard.

The chain crosses three disciplines — Blacksmith to Lv 41, Goldsmith to Lv 40 and Carpenter to Lv 39 — 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.