Dwarven Mythril Grimoire

Taken all the way down to base materials, one Dwarven Mythril Grimoire is 2 crafting steps deep and needs 4 intermediates — Dwarven Mythril Ingot ×2, Enchanted Dimythrite Ink ×1, Lignum Vitae Lumber ×1 and 1 other — which resolve to 8 distinct raw materials totalling 24 units, plus 48 crystals.

That bill outweighs 8,926 of the 13,602 recipes tracked here and 1,315 of the 1,591 Alchemist ones, and 4,464 recipes nest deeper.

Only 14 of those crystals go into the final step; the other 34 are burned by the intermediates, so the real crystal cost is 14 Fire Crystal, 14 Water Crystal, 13 Wind Crystal and 1 other kind.

The chain crosses four disciplines — Alchemist to Lv 78, Blacksmith to Lv 78, Carpenter to Lv 78 and Goldsmith to Lv 72 — 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: Gold Ore (9:00). That window comes round once per Eorzean day, every 70 real-world minutes.

Of the intermediates, Dwarven Mythril Ingot has the widest use: 168 recipes call for it, spanning seven of the eight crafting classes.