Oasis Bed

Taken all the way down to base materials, one Oasis Bed is 3 crafting steps deep and needs 4 intermediates — Undyed Linen ×4, Iron Ingot ×2, Oak Lumber ×2 and 1 other — which resolve to 3 distinct raw materials totalling 20 units, plus 31 crystals.

That bill outweighs 7,876 of the 13,602 recipes tracked here and 1,022 of the 1,968 Weaver ones, and 337 recipes nest deeper.

Only 7 of those crystals go into the final step; the other 24 are burned by the intermediates, so the real crystal cost is 20 Lightning Shard, 9 Wind Shard and 2 Fire Shard.

The chain crosses three disciplines — Weaver to Lv 34, Carpenter to Lv 32 and Blacksmith to Lv 16 — so no single class can finish it unaided.

All 3 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, Iron Ingot has the widest use: 113 recipes call for it, spanning seven of the eight crafting classes.