Bomb Stove ★★

Taken all the way down to base materials, one Bomb Stove is 3 crafting steps deep and needs 3 intermediates — Chromite Ingot ×2, Cobalt Ingot ×2 and Molybdenum Ingot ×2 — which resolve to 7 distinct raw materials totalling 36 units, plus 32 crystals.

That bill outweighs 11,383 of the 13,602 recipes tracked here and 1,369 of the 1,932 Blacksmith ones, and 337 recipes nest deeper.

Only 4 of those crystals go into the final step; the other 28 are burned by the intermediates, so the real crystal cost is 10 Fire Crystal, 10 Fire Shard, 6 Earth Cluster and 1 other kind.

Every step is Blacksmith work, from a Lv 42 intermediate up to the Lv 70 finish, so one class covers the whole chain.

6 of the 7 raw materials come out of the ground, and one of them is time-gated: Chromite Ore (10:00, 22:00). The widest gap between consecutive opening times is 12 Eorzean hours, about 35 real-world minutes.

Of the intermediates, Cobalt Ingot has the widest use: 145 recipes call for it, spanning seven of the eight crafting classes.