Imitation Trapdoor

Taken all the way down to base materials, one Imitation Trapdoor is 2 crafting steps deep and needs 2 intermediates — High Durium Ingot ×5 and Ironwood Lumber ×5 — which resolve to 3 distinct raw materials totalling 55 units, plus 96 crystals.

That bill outweighs 12,983 of the 13,602 recipes tracked here and 1,389 of the 1,552 Carpenter ones, and 4,464 recipes nest deeper.

Only 16 of those crystals go into the final step; the other 80 are burned by the intermediates, so the real crystal cost is 48 Wind Crystal, 40 Fire Crystal and 8 Ice Crystal.

The chain crosses two disciplines — Carpenter to Lv 90 and Blacksmith to Lv 82 — 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, Ironwood Lumber has the widest use: 72 recipes call for it, spanning six of the eight crafting classes.