High Steel Tachi

Taken all the way down to base materials, one High Steel Tachi is 2 crafting steps deep and needs 5 intermediates — High Steel Nugget ×3, Beech Lumber ×1, Cloud Mica Whetstone ×1 and 2 others — which resolve to 8 distinct raw materials totalling 33 units, plus 30 crystals.

That bill outweighs 10,907 of the 13,602 recipes tracked here and 1,266 of the 1,932 Blacksmith ones, and 4,464 recipes nest deeper.

Only 5 of those crystals go into the final step; the other 25 are burned by the intermediates, so the real crystal cost is 12 Fire Crystal, 11 Wind Crystal, 5 Lightning Crystal and 1 other kind.

The chain crosses four disciplines — Blacksmith to Lv 61, Carpenter to Lv 61, Goldsmith to Lv 61 and Weaver to Lv 57 — so no single class can finish it unaided.

7 of the 8 raw materials come out of the ground, and one of them is time-gated: Silkworm Cocoon (1:00). That window comes round once per Eorzean day, every 70 real-world minutes.

Of the intermediates, Crawler Silk has the widest use: 178 recipes call for it, spanning five of the eight crafting classes.