High Mythril Armor

Taken all the way down to base materials, one High Mythril Armor is 3 crafting steps deep and needs 3 intermediates — Mythril Plate ×4, Electrum Ingot ×1 and Mythril Ingot ×8 — which resolve to 2 distinct raw materials totalling 28 units, plus 63 crystals.

That bill outweighs 9,936 of the 13,602 recipes tracked here and 988 of the 1,441 Armorer ones, and 337 recipes nest deeper.

Only 10 of those crystals go into the final step; the other 53 are burned by the intermediates, so the real crystal cost is 32 Fire Shard, 21 Ice Shard, 5 Earth Shard and 1 other kind.

The chain crosses three disciplines — Armorer to Lv 44, Goldsmith to Lv 42 and Blacksmith to Lv 38 — so no single class can finish it unaided.

Both raw materials are gathered, and no spot for either is timed, so nothing in the tree waits on the Eorzean clock.

Of the intermediates, Electrum Ingot has the widest use: 234 recipes call for it, spanning seven of the eight crafting classes.