Riviera Cottage Roof (Wood)

Taken all the way down to base materials, one Riviera Cottage Roof (Wood) is 3 crafting steps deep and needs 5 intermediates — Roof Tile ×15, Iron Joint Plate ×10, Iron Nails ×10 and 2 others — which resolve to 4 distinct raw materials totalling 120 units, plus 73 crystals.

That bill outweighs 13,498 of the 13,602 recipes tracked here and 1,578 of the 1,591 Alchemist ones, and 337 recipes nest deeper.

Only 8 of those crystals go into the final step; the other 65 are burned by the intermediates, so the real crystal cost is 30 Fire Shard, 19 Water Shard, 10 Ice Shard and 2 other kinds.

The chain crosses four disciplines — Alchemist to Lv 20, Carpenter to Lv 21, Blacksmith to Lv 16 and Armorer to Lv 15 — so no single class can finish it unaided.

One intermediate outranks the result: Yew Lumber is a Lv 21 Carpenter recipe feeding a Lv 20 craft, so that step, not the last one, is the real gate.

All 4 raw materials are gathered, and not one of their spots is timed, so nothing in the tree waits on the Eorzean clock.