Deepgold Blade

Taken all the way down to base materials, one Deepgold Blade is 2 crafting steps deep and needs 4 intermediates — Deepgold Nugget ×3, Hard Mudstone Whetstone ×1, Stonegold Nugget ×1 and 1 other — which resolve to 6 distinct raw materials totalling 28 units, plus 43 crystals.

That bill outweighs 9,936 of the 13,602 recipes tracked here and 1,152 of the 1,932 Blacksmith ones, and 4,464 recipes nest deeper.

Only 11 of those crystals go into the final step; the other 32 are burned by the intermediates, so the real crystal cost is 24 Fire Crystal, 12 Wind Crystal, 5 Earth Crystal and 1 other kind.

The chain crosses three disciplines — Blacksmith to Lv 71, Goldsmith to Lv 71 and Weaver to Lv 68 — so no single class can finish it unaided.

All 6 raw materials are gathered, 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, Twinthread has the widest use: 109 recipes call for it, spanning six of the eight crafting classes.