Oasis Stone Wall

Taken all the way down to base materials, one Oasis Stone Wall is 3 crafting steps deep and needs 3 intermediates — Mortar ×25, Cut Stone ×15 and Distilled Water ×25 — which resolve to 6 distinct raw materials totalling 195 units, plus 135 crystals.

That bill outweighs 13,559 of the 13,602 recipes tracked here and 2,200 of the 2,216 Goldsmith ones, and 337 recipes nest deeper.

Only 40 of those crystals go into the final step; the other 95 are burned by the intermediates, so the real crystal cost is 65 Wind Shard, 50 Water Shard and 20 Fire Shard.

The chain crosses two disciplines — Goldsmith to Lv 43 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.