Mythril Spectacles

Taken all the way down to base materials, one Mythril Spectacles is 3 crafting steps deep and needs 3 intermediates — Clear Glass Lens ×1, Mythril Ingot ×1 and Natron ×1 — which resolve to 4 distinct raw materials totalling 6 units, plus 16 crystals.

That bill outweighs 4,542 of the 13,602 recipes tracked here and 643 of the 2,216 Goldsmith ones, and 337 recipes nest deeper.

Only 7 of those crystals go into the final step; the other 9 are burned by the intermediates, so the real crystal cost is 7 Fire Shard, 5 Water Shard and 4 Wind Shard.

The chain crosses three disciplines — Goldsmith to Lv 34, Blacksmith to Lv 38 and Alchemist to Lv 28 — so no single class can finish it unaided.

One intermediate outranks the result: Mythril Ingot is a Lv 38 Blacksmith recipe feeding a Lv 34 craft, so that step, not the last one, is the real gate.

All 4 raw materials are gathered, and not one of their spots is timed, so nothing in the tree waits on the Eorzean clock.