Classic Spectacles

Taken all the way down to base materials, one Classic 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 18 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 9 of those crystals go into the final step; the other 9 are burned by the intermediates, so the real crystal cost is 8 Fire Shard, 5 Water Shard and 5 Wind Shard.

The chain crosses three disciplines — Goldsmith to Lv 40, Blacksmith to Lv 38 and Alchemist to Lv 28 — so no single class can finish it unaided.

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

Of the intermediates, Mythril Ingot has the widest use: 135 recipes call for it, spanning seven of the eight crafting classes.