Iron Plate Flooring

Taken all the way down to base materials, one Iron Plate Flooring is 3 crafting steps deep and needs 5 intermediates — Iron Plate ×2, Steel Plate ×2, Steel Rivets ×2 and 2 others — which resolve to 2 distinct raw materials totalling 30 units, plus 35 crystals.

That bill outweighs 10,368 of the 13,602 recipes tracked here and 1,081 of the 1,441 Armorer ones, and 337 recipes nest deeper.

Only 5 of those crystals go into the final step; the other 30 are burned by the intermediates, so the real crystal cost is 22 Fire Shard, 11 Ice Shard and 2 Earth Shard.

The chain crosses two disciplines — Armorer to Lv 29 and Blacksmith to Lv 29 — so no single class can finish it unaided.

Both raw materials are gathered, and no spot for either is timed, so nothing in the tree waits on the Eorzean clock.

Of the intermediates, Steel Ingot has the widest use: 125 recipes call for it, spanning seven of the eight crafting classes.