Rarefied Grilled Rail

Taken all the way down to base materials, one Rarefied Grilled Rail is 2 crafting steps deep and needs 1 intermediate — Frantoio Oil ×2 — which resolves to 4 distinct raw materials totalling 9 units, plus 18 crystals.

That bill outweighs 5,492 of the 13,602 recipes tracked here and 644 of the 1,058 Culinarian ones, and 4,464 recipes nest deeper.

Only 12 of those crystals go into the final step; the other 6 are burned by the intermediates, so the real crystal cost is 12 Fire Crystal and 6 Water Crystal.

Every step is Culinarian work, from a Lv 71 intermediate up to the Lv 72 finish, so one class covers the whole chain.

3 of the 4 raw materials come out of the ground, and one of them is time-gated: Abalathian Rock Salt (10:00, 22:00). The widest gap between consecutive opening times is 12 Eorzean hours, about 35 real-world minutes.

Of the intermediates, Frantoio Oil has the widest use: 35 recipes call for it, all of them Culinarian recipes.