Oasis House Wall (Composite)

Taken all the way down to base materials, one Oasis House Wall (Composite) is 3 crafting steps deep and needs 5 intermediates — Firebricks ×20, Mortar ×10, Cut Stone ×5 and 2 others — which resolve to 7 distinct raw materials totalling 130 units, plus 97 crystals.

That bill outweighs 13,518 of the 13,602 recipes tracked here and 2,186 of the 2,216 Goldsmith ones, and 337 recipes nest deeper.

Only 32 of those crystals go into the final step; the other 65 are burned by the intermediates, so the real crystal cost is 41 Wind Shard, 40 Water Shard and 16 Fire Shard.

The chain crosses three disciplines — Goldsmith to Lv 38, Carpenter to Lv 25 and Alchemist to Lv 20 — so no single class can finish it unaided.

All 7 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.