Riviera Roofed Wall

Taken all the way down to base materials, one Riviera Roofed Wall is 3 crafting steps deep and needs 4 intermediates — Roof Tile ×30, Mortar ×20, Cut Stone ×10 and 1 other — which resolve to 6 distinct raw materials totalling 200 units, plus 124 crystals.

That bill outweighs 13,560 of the 13,602 recipes tracked here and 2,201 of the 2,216 Goldsmith ones, and 337 recipes nest deeper.

Only 24 of those crystals go into the final step; the other 100 are burned by the intermediates, so the real crystal cost is 70 Water Shard, 42 Wind Shard and 12 Fire Shard.

The chain crosses two disciplines — Goldsmith to Lv 31 and Alchemist to Lv 20 — so no single class can finish it unaided.

All 6 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, Mortar has the widest use: 140 recipes call for it, spanning six of the eight crafting classes.