Hingan Mansion Wall (Nanpu)

Taken all the way down to base materials, one Hingan Mansion Wall (Nanpu) is 3 crafting steps deep and needs 6 intermediates — Aurum Regis Nugget ×15, Felt Lining ×15, Varnish ×15 and 3 others — which resolve to 11 distinct raw materials totalling 300 units, plus 390 crystals.

That bill outweighs 13,591 of the 13,602 recipes tracked here and 1,550 of the 1,552 Carpenter ones, and 337 recipes nest deeper.

Only 40 of those crystals go into the final step; the other 350 are burned by the intermediates, so the real crystal cost is 150 Water Shard, 145 Wind Crystal, 75 Lightning Shard and 1 other kind.

The chain crosses four disciplines — Carpenter to Lv 68, Goldsmith to Lv 58, Weaver to Lv 42 and Alchemist to Lv 41 — so no single class can finish it unaided.

9 of the 11 raw materials come out of the ground, and one of them is time-gated: Gold Ore (9:00). That window comes round once per Eorzean day, every 70 real-world minutes.

Of the intermediates, Aurum Regis Nugget has the widest use: 185 recipes call for it, spanning seven of the eight crafting classes.