Oasis Partition

Taken all the way down to base materials, one Oasis Partition is 3 crafting steps deep and needs 3 intermediates — Brass Ingot ×4, Mortar ×1 and Distilled Water ×1 — which resolve to 5 distinct raw materials totalling 19 units, plus 8 crystals.

That bill outweighs 7,589 of the 13,602 recipes tracked here and 1,074 of the 2,216 Goldsmith ones, and 337 recipes nest deeper.

Only 2 of those crystals go into the final step; the other 6 are burned by the intermediates, so the real crystal cost is 5 Wind Shard, 2 Water Shard and 1 Fire Shard.

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

All 5 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.