Adamantite Mortar

Taken all the way down to base materials, one Adamantite Mortar is 2 crafting steps deep and needs 2 intermediates — Adamantite Nugget ×3 and Birch Lumber ×1 — which resolve to 3 distinct raw materials totalling 23 units, plus 30 crystals.

That bill outweighs 8,647 of the 13,602 recipes tracked here and 956 of the 1,932 Blacksmith ones, and 4,464 recipes nest deeper.

Only 10 of those crystals go into the final step; the other 20 are burned by the intermediates, so the real crystal cost is 20 Fire Crystal, 5 Earth Crystal and 5 Wind Crystal.

The chain crosses two disciplines — Blacksmith to Lv 59 and Carpenter to Lv 58 — so no single class can finish it unaided.

All 3 raw materials are gathered, and 2 of them are time-gated: Adamantite Ore (0:00, 2:00, 6:00, 10:00, 12:00, 14:00, 18:00, 22:00) and Darksteel Ore (1:00). The widest gap between consecutive opening times is 4 Eorzean hours, about 12 real-world minutes.

Of the intermediates, Adamantite Nugget has the widest use: 79 recipes call for it, spanning six of the eight crafting classes.