Brass Spectacles

Taken all the way down to base materials, one Brass Spectacles is 3 crafting steps deep and needs 3 intermediates — Brass Ingot ×1, Clear Glass Lens ×1 and Natron ×1 — which resolve to 5 distinct raw materials totalling 6 units, plus 8 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 2 of those crystals go into the final step; the other 6 are burned by the intermediates, so the real crystal cost is 5 Water Shard, 2 Wind Shard and 1 Fire Shard.

The chain crosses two disciplines — Goldsmith to Lv 14 and Alchemist to Lv 28 — so no single class can finish it unaided.

One intermediate outranks the result: Clear Glass Lens is a Lv 28 Alchemist recipe feeding a Lv 14 craft, so that step, not the last one, is the real gate.

All 5 raw materials are gathered, and not one of their spots is timed, so nothing in the tree waits on the Eorzean clock.