Ihuykanite Ring of Healing

Taken all the way down to base materials, one Ihuykanite Ring of Healing is 3 crafting steps deep and needs 4 intermediates — Ihuykanite ×1, Lar Ingot ×1, Ruthenium Ingot ×1 and 1 other — which resolve to 6 distinct raw materials totalling 19 units, plus 47 crystals.

That bill outweighs 7,589 of the 13,602 recipes tracked here and 1,074 of the 2,216 Goldsmith ones, and 337 recipes nest deeper.

Only 15 of those crystals go into the final step; the other 32 are burned by the intermediates, so the real crystal cost is 32 Wind Crystal and 15 Fire Crystal.

The chain crosses two disciplines — Goldsmith to Lv 93 and Blacksmith to Lv 92 — so no single class can finish it unaided.

All 6 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, Lar Ingot has the widest use: 101 recipes call for it, spanning six of the eight crafting classes.