Hingan Mansion Roof (Mokuzo)

Taken all the way down to base materials, one Hingan Mansion Roof (Mokuzo) is 3 crafting steps deep and needs 8 intermediates — Cobalt Joint Plate ×20, Mortar ×20, Adamantite Rivets ×15 and 5 others — which resolve to 9 distinct raw materials totalling 355 units, plus 555 crystals.

That bill outweighs 13,599 of the 13,602 recipes tracked here and 1,931 of the 1,932 Blacksmith ones, and 337 recipes nest deeper.

Only 40 of those crystals go into the final step; the other 515 are burned by the intermediates, so the real crystal cost is 220 Fire Crystal, 100 Fire Shard, 100 Ice Shard and 3 other kinds.

The chain crosses four disciplines — Blacksmith to Lv 68, Carpenter to Lv 58, Armorer to Lv 44 and Alchemist to Lv 20 — so no single class can finish it unaided.

All 9 raw materials are gathered, and 2 of them are time-gated: Adamantite Ore (0:00, 2:00, 6:00, 10:00, 12:00, 14:00, 18:00, 22:00) and Darksteel Ore (1:00). The widest gap between consecutive opening times is 4 Eorzean hours, about 12 real-world minutes.

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