Deepgold Greatsword

Taken all the way down to base materials, one Deepgold Greatsword is 2 crafting steps deep and needs 5 intermediates — Deepgold Ingot ×3, Beetle Glue ×1, Cobalt Ingot ×1 and 2 others — which resolve to 9 distinct raw materials totalling 32 units, plus 49 crystals.

That bill outweighs 10,750 of the 13,602 recipes tracked here and 1,223 of the 1,932 Blacksmith ones, and 4,464 recipes nest deeper.

Only 12 of those crystals go into the final step; the other 37 are burned by the intermediates, so the real crystal cost is 24 Fire Crystal, 10 Wind Crystal, 6 Earth Crystal and 2 other kinds.

The chain crosses four disciplines — Blacksmith to Lv 72, Goldsmith to Lv 72, Alchemist to Lv 64 and Carpenter to Lv 54 — so no single class can finish it unaided.

7 of the 9 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, Cobalt Ingot has the widest use: 145 recipes call for it, spanning seven of the eight crafting classes.