Dwarven Mythril Planisphere

Taken all the way down to base materials, one Dwarven Mythril Planisphere is 3 crafting steps deep and needs 5 intermediates — Dwarven Mythril Ingot ×2, Enchanted Dimythrite Ink ×1, Stonegold Nugget ×1 and 2 others — which resolve to 9 distinct raw materials totalling 26 units, plus 55 crystals.

That bill outweighs 9,543 of the 13,602 recipes tracked here and 1,087 of the 1,932 Blacksmith ones, and 337 recipes nest deeper.

Only 14 of those crystals go into the final step; the other 41 are burned by the intermediates, so the real crystal cost is 21 Fire Crystal, 20 Wind Crystal, 7 Earth Crystal and 1 other kind.

The chain crosses three disciplines — Blacksmith to Lv 78, Alchemist to Lv 78 and Goldsmith to Lv 76 — so no single class can finish it unaided.

8 of the 9 raw materials come out of the ground, and 2 of them are time-gated: Raw Triplite (0:00, 12:00) and Gold Ore (9:00). The widest gap between consecutive opening times is 12 Eorzean hours, about 35 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.