Titanium Greatsword

Taken all the way down to base materials, one Titanium Greatsword is 3 crafting steps deep and needs 6 intermediates — Darksteel Nugget ×3, Titanium Ingot ×3, Electrum Ingot ×1 and 3 others — which resolve to 9 distinct raw materials totalling 60 units, plus 62 crystals.

That bill outweighs 13,112 of the 13,602 recipes tracked here and 1,799 of the 1,932 Blacksmith ones, and 337 recipes nest deeper.

Only 9 of those crystals go into the final step; the other 53 are burned by the intermediates, so the real crystal cost is 49 Fire Crystal, 5 Wind Shard, 4 Earth Crystal and 1 other kind.

The chain crosses three disciplines — Blacksmith to Lv 57, Alchemist to Lv 55 and Goldsmith to Lv 42 — so no single class can finish it unaided.

6 of the 9 raw materials come out of the ground, and one of them is time-gated: Darksteel Ore (1:00). That window comes round once per Eorzean day, every 70 real-world minutes.

Of the intermediates, Electrum Ingot has the widest use: 234 recipes call for it, spanning seven of the eight crafting classes.