Mythril Awl

Taken all the way down to base materials, one Mythril Awl is 2 crafting steps deep and needs 3 intermediates — Linseed Oil ×1, Mythril Ingot ×1 and Oak Lumber ×1 — which resolve to 3 distinct raw materials totalling 8 units, plus 19 crystals.

That bill outweighs 5,254 of the 13,602 recipes tracked here and 529 of the 1,932 Blacksmith ones, and 4,464 recipes nest deeper.

Only 9 of those crystals go into the final step; the other 10 are burned by the intermediates, so the real crystal cost is 9 Fire Shard, 4 Earth Shard, 3 Water Shard and 1 other kind.

The chain crosses three disciplines — Blacksmith to Lv 40, Carpenter to Lv 32 and Alchemist 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, Mythril Ingot has the widest use: 135 recipes call for it, spanning seven of the eight crafting classes.