Metal Flooring

Taken all the way down to base materials, one Metal Flooring is 3 crafting steps deep and needs 5 intermediates — Cobalt Plate ×2, Steel Plate ×2, Steel Rivets ×2 and 2 others — which resolve to 3 distinct raw materials totalling 30 units, plus 65 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 11 of those crystals go into the final step; the other 54 are burned by the intermediates, so the real crystal cost is 38 Fire Shard, 22 Ice Shard and 5 Earth Shard.

The chain crosses two disciplines — Armorer to Lv 46 and Blacksmith to Lv 42 — 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, Cobalt Ingot has the widest use: 145 recipes call for it, spanning seven of the eight crafting classes.