Black Star Ring of Crafting

Taken all the way down to base materials, one Black Star Ring of Crafting is 3 crafting steps deep and needs 3 intermediates — Black Star ×1, Ra'Kaznar Ingot ×1 and Magnesia Whetstone ×1 — which resolve to 3 distinct raw materials totalling 13 units, plus 40 crystals.

That bill outweighs 6,426 of the 13,602 recipes tracked here and 599 of the 1,441 Armorer ones, and 337 recipes nest deeper.

Only 16 of those crystals go into the final step; the other 24 are burned by the intermediates, so the real crystal cost is 8 Earth Crystal, 8 Fire Crystal, 8 Ice Crystal and 2 other kinds.

The chain crosses four disciplines — Armorer to Lv 100, Blacksmith to Lv 98, Goldsmith to Lv 98 and Alchemist to Lv 95 — so no single class can finish it unaided.

All 3 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, Ra'Kaznar Ingot has the widest use: 166 recipes call for it, spanning seven of the eight crafting classes.