Riviera Bathtub

Taken all the way down to base materials, one Riviera Bathtub is 3 crafting steps deep and needs 6 intermediates — Cut Stone ×6, Darksteel Nugget ×3, Mahogany Lumber ×2 and 3 others — which resolve to 7 distinct raw materials totalling 45 units, plus 56 crystals.

That bill outweighs 12,451 of the 13,602 recipes tracked here and 1,996 of the 2,216 Goldsmith ones, and 337 recipes nest deeper.

Only 12 of those crystals go into the final step; the other 44 are burned by the intermediates, so the real crystal cost is 35 Wind Shard, 9 Fire Crystal, 6 Fire Shard and 2 other kinds.

The chain crosses four disciplines — Goldsmith to Lv 50, Blacksmith to Lv 50, Carpenter to Lv 39 and Alchemist to Lv 28 — so no single class can finish it unaided.

All 7 raw materials are gathered, 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, Darksteel Nugget has the widest use: 121 recipes call for it, spanning seven of the eight crafting classes.