Hingan Door (Nanpu)

Taken all the way down to base materials, one Hingan Door (Nanpu) is 2 crafting steps deep and needs 3 intermediates — Aurum Regis Nugget ×4, Pine Lumber ×4 and Cut Stone ×3 — which resolve to 4 distinct raw materials totalling 49 units, plus 52 crystals.

That bill outweighs 12,749 of the 13,602 recipes tracked here and 1,352 of the 1,552 Carpenter ones, and 4,464 recipes nest deeper.

Only 7 of those crystals go into the final step; the other 45 are burned by the intermediates, so the real crystal cost is 40 Wind Crystal, 9 Wind Shard and 3 Ice Crystal.

The chain crosses two disciplines — Carpenter to Lv 64 and Goldsmith to Lv 58 — so no single class can finish it unaided.

One intermediate outranks the result: Pine Lumber is a Lv 64 Carpenter recipe feeding a Lv 63 craft, so that step, not the last one, is the real gate.

All 4 raw materials are gathered, and one of them is time-gated: Gold Ore (9:00). That window comes round once per Eorzean day, every 70 real-world minutes.