Hells' Kitchen

Taken all the way down to base materials, one Hells' Kitchen is 3 crafting steps deep and needs 3 intermediates — Cobalt Plate ×1, Rosewood Lumber ×1 and Cobalt Ingot ×2 — which resolve to 3 distinct raw materials totalling 9 units, plus 32 crystals.

That bill outweighs 5,492 of the 13,602 recipes tracked here and 519 of the 1,441 Armorer ones, and 337 recipes nest deeper.

Only 11 of those crystals go into the final step; the other 21 are burned by the intermediates, so the real crystal cost is 11 Ice Shard, 10 Fire Shard, 6 Wind Shard and 1 other kind.

The chain crosses three disciplines — Armorer to Lv 47, Carpenter to Lv 45 and Blacksmith to Lv 42 — 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, Cobalt Ingot has the widest use: 145 recipes call for it, spanning seven of the eight crafting classes.