Oasis Cupboard

Taken all the way down to base materials, one Oasis Cupboard is 2 crafting steps deep and needs 4 intermediates — Walnut Lumber ×3, Beeswax ×2, Brass Ingot ×2 and 1 other — which resolve to 5 distinct raw materials totalling 27 units, plus 16 crystals.

That bill outweighs 9,763 of the 13,602 recipes tracked here and 1,005 of the 1,552 Carpenter ones, and 4,464 recipes nest deeper.

Only 4 of those crystals go into the final step; the other 12 are burned by the intermediates, so the real crystal cost is 12 Wind Shard, 2 Ice Shard and 2 Water Shard.

The chain crosses three disciplines — Carpenter to Lv 25, Goldsmith to Lv 14 and Alchemist to Lv 10 — 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, Walnut Lumber has the widest use: 128 recipes call for it, spanning eight of the eight crafting classes.