Plasma Lamp ★★

Taken all the way down to base materials, one Plasma Lamp is 3 crafting steps deep and needs 4 intermediates — Darksteel Ingot ×3, Vanya Silk ×2, Darksteel Nugget ×6 and 1 other — which resolve to 7 distinct raw materials totalling 72 units, plus 39 crystals.

That bill outweighs 13,341 of the 13,602 recipes tracked here and 1,892 of the 1,932 Blacksmith ones, and 337 recipes nest deeper.

Only 10 of those crystals go into the final step; the other 29 are burned by the intermediates, so the real crystal cost is 18 Fire Crystal, 16 Lightning Crystal, 3 Fire Cluster and 1 other kind.

The chain crosses two disciplines — Blacksmith to Lv 50 and Weaver to Lv 50 — so no single class can finish it unaided.

3 of the 7 raw materials come out of the ground, and 2 of them are time-gated: Darksteel Ore (1:00) and Silkworm Cocoon (1:00). That window comes round once per Eorzean day, every 70 real-world minutes.

Of the intermediates, Silk Thread has the widest use: 175 recipes call for it, spanning six of the eight crafting classes.