Iron Sallet

Taken all the way down to base materials, one Iron Sallet is 3 crafting steps deep and needs 3 intermediates — Iron Plate ×1, Iron Rivets ×1 and Iron Ingot ×4 — which resolve to 1 distinct raw material totalling 12 units, plus 8 crystals.

That bill outweighs 6,221 of the 13,602 recipes tracked here and 580 of the 1,441 Armorer ones, and 337 recipes nest deeper.

Only 2 of those crystals go into the final step; the other 6 are burned by the intermediates, so the real crystal cost is 5 Fire Shard, 2 Ice Shard and 1 Earth Shard.

The chain crosses two disciplines — Armorer to Lv 19 and Blacksmith to Lv 18 — so no single class can finish it unaided.

Its single raw material is gathered, and no spot for it is timed, so nothing in the tree waits on the Eorzean clock.

Iron Sallet is itself consumed by 1 further recipe, all of them Armorer recipes.