Hallowed Chestnut Ring

Taken all the way down to base materials, one Hallowed Chestnut Ring is 3 crafting steps deep and needs 5 intermediates — Hallowed Chestnut Lumber ×1, Varnish ×1, Hallowed Water ×2 and 2 others — which resolve to 6 distinct raw materials totalling 14 units, plus 31 crystals.

That bill outweighs 6,557 of the 13,602 recipes tracked here and 639 of the 1,552 Carpenter ones, and 337 recipes nest deeper.

Only 9 of those crystals go into the final step; the other 22 are burned by the intermediates, so the real crystal cost is 14 Wind Crystal, 8 Water Shard, 5 Water Crystal and 1 other kind.

The chain crosses two disciplines — Carpenter to Lv 57 and Alchemist to Lv 56 — so no single class can finish it unaided.

5 of the 6 raw materials come out of the ground, and one of them is time-gated: Abalathian Mistletoe (6:00, 18:00). The widest gap between consecutive opening times is 12 Eorzean hours, about 35 real-world minutes.

Of the intermediates, Varnish has the widest use: 114 recipes call for it, spanning four of the eight crafting classes.