Hingan Open-shelf Bookcase

Taken all the way down to base materials, one Hingan Open-shelf Bookcase is 3 crafting steps deep and needs 7 intermediates — Zelkova Lumber ×6, Cobalt Rivets ×4, Darksteel Ingot ×3 and 4 others — which resolve to 8 distinct raw materials totalling 96 units, plus 125 crystals.

That bill outweighs 13,461 of the 13,602 recipes tracked here and 1,506 of the 1,552 Carpenter ones, and 337 recipes nest deeper.

Only 10 of those crystals go into the final step; the other 115 are burned by the intermediates, so the real crystal cost is 40 Fire Shard, 35 Wind Crystal, 24 Water Shard and 3 other kinds.

The chain crosses three disciplines — Carpenter to Lv 68, Blacksmith to Lv 50 and Alchemist to Lv 41 — so no single class can finish it unaided.

6 of the 8 raw materials come out of the ground, and one of them is time-gated: Darksteel Ore (1:00). That window comes round once per Eorzean day, every 70 real-world minutes.

Of the intermediates, Cobalt Ingot has the widest use: 145 recipes call for it, spanning seven of the eight crafting classes.