Illumination Module ★★

Taken all the way down to base materials, one Illumination Module is 3 crafting steps deep and needs 2 intermediates — Rose Gold Ingot ×2 and Rose Gold Nugget ×4 — which resolve to 7 distinct raw materials totalling 39 units, plus 16 crystals.

That bill outweighs 11,756 of the 13,602 recipes tracked here and 1,892 of the 2,216 Goldsmith ones, and 337 recipes nest deeper.

Only 2 of those crystals go into the final step; the other 14 are burned by the intermediates, so the real crystal cost is 12 Wind Crystal, 3 Wind Cluster and 1 Fire Cluster.

Every step is Goldsmith work, from a Lv 50 intermediate up to the Lv 50 finish, so one class covers the whole chain.

2 of the 7 raw materials come out of the ground, and one of them is time-gated: Gold Ore (9:00). That window comes round once per Eorzean day, every 70 real-world minutes.

Of the intermediates, Rose Gold Nugget has the widest use: 179 recipes call for it, spanning seven of the eight crafting classes.