Amateur's Hatchet

Taken all the way down to base materials, one Amateur's Hatchet is 2 crafting steps deep and needs 2 intermediates — Ash Lumber ×1 and Bronze Ingot ×1 — which resolve to 3 distinct raw materials totalling 6 units, plus 4 crystals.

That bill outweighs 4,542 of the 13,602 recipes tracked here and 467 of the 1,932 Blacksmith ones, and 4,464 recipes nest deeper.

Only 2 of those crystals go into the final step; the other 2 are burned by the intermediates, so the real crystal cost is 2 Fire Shard, 1 Earth Shard and 1 Wind Shard.

The chain crosses two disciplines — Blacksmith to Lv 12 and Carpenter to Lv 10 — 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, Bronze Ingot has the widest use: 76 recipes call for it, spanning six of the eight crafting classes.