Hingan Oblong Window

Taken all the way down to base materials, one Hingan Oblong Window is 3 crafting steps deep and needs 3 intermediates — Beech Lumber ×6, Clear Glass Lens ×5 and Natron ×5 — which resolve to 4 distinct raw materials totalling 39 units, plus 48 crystals.

That bill outweighs 11,756 of the 13,602 recipes tracked here and 1,225 of the 1,552 Carpenter ones, and 337 recipes nest deeper.

Only 5 of those crystals go into the final step; the other 43 are burned by the intermediates, so the real crystal cost is 25 Water Shard, 21 Wind Crystal and 2 Ice Crystal.

The chain crosses two disciplines — Carpenter to Lv 61 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, Clear Glass Lens has the widest use: 96 recipes call for it, spanning six of the eight crafting classes.