Darksteel Haubergeon ★★

Taken all the way down to base materials, one Darksteel Haubergeon is 3 crafting steps deep and needs 6 intermediates — Darksteel Ingot ×1, Darksteel Rings ×1, Hippogryph Leather ×1 and 3 others — which resolve to 9 distinct raw materials totalling 26 units, plus 25 crystals.

That bill outweighs 9,543 of the 13,602 recipes tracked here and 942 of the 1,441 Armorer ones, and 337 recipes nest deeper.

Only 2 of those crystals go into the final step; the other 23 are burned by the intermediates, so the real crystal cost is 9 Fire Crystal, 5 Lightning Shard, 3 Earth Crystal and 5 other kinds.

The chain crosses five disciplines — Armorer to Lv 50, Blacksmith to Lv 50, Leatherworker to Lv 50, Weaver to Lv 43 and Alchemist to Lv 25 — so no single class can finish it unaided.

4 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, Hippogryph Leather has the widest use: 131 recipes call for it, spanning seven of the eight crafting classes.