Astral Birch Lumber ★★

Taken all the way down to base materials, a batch of 3 Astral Birch Lumber is 2 crafting steps deep and needs 2 intermediates — Birch Lumber ×2 and Astral Oil ×1 — which resolve to 5 distinct raw materials totalling 20 units, plus 17 crystals.

That bill outweighs 7,876 of the 13,602 recipes tracked here and 791 of the 1,552 Carpenter ones, and 4,464 recipes nest deeper.

Only 4 of those crystals go into the final step; the other 13 are burned by the intermediates, so the real crystal cost is 10 Wind Crystal, 2 Ice Cluster, 2 Water Cluster and 2 other kinds.

The chain crosses two disciplines — Carpenter to Lv 60 and Alchemist to Lv 60 — so no single class can finish it unaided.

3 of the 5 raw materials come out of the ground, and 2 of them are time-gated: Astral Moraine (0:00, 12:00) and Seventh Heaven (4:00, 16:00). The widest gap between consecutive opening times is 8 Eorzean hours, about 23 real-world minutes.

Astral Birch Lumber is itself consumed by 27 further recipes, spanning five of the eight crafting classes.