Iron Ornamental Hammer

Taken all the way down to base materials, one Iron Ornamental Hammer is 4 crafting steps deep and needs 5 intermediates — Brass Ingot ×1, Initiate's Chaser Hammer ×1, Iron Ingot ×3 and 2 others — which resolve to 4 distinct raw materials totalling 15 units, plus 15 crystals.

That bill outweighs 6,735 of the 13,602 recipes tracked here and 730 of the 1,932 Blacksmith ones, and 1 recipe nests deeper.

Only 4 of those crystals go into the final step; the other 11 are burned by the intermediates, so the real crystal cost is 9 Fire Shard, 3 Earth Shard and 3 Wind Shard.

The chain crosses three disciplines — Blacksmith to Lv 26, Carpenter to Lv 21 and Goldsmith to Lv 14 — so no single class can finish it unaided.

All 4 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, Iron Ingot has the widest use: 113 recipes call for it, spanning seven of the eight crafting classes.