Sky Rat Mask of Striking ★★★★

Taken all the way down to base materials, one Sky Rat Mask of Striking is 2 crafting steps deep and needs 4 intermediates — Cloud Mythril Ingot ×2, Grade 2 Strength Dissolvent ×1, Griffin Leather Strap ×1 and 1 other — which resolve to 7 distinct raw materials totalling 18 units, plus 48 crystals.

That bill outweighs 7,380 of the 13,602 recipes tracked here and 694 of the 1,441 Armorer ones, and 4,464 recipes nest deeper.

Only 6 of those crystals go into the final step; the other 42 are burned by the intermediates, so the real crystal cost is 14 Earth Crystal, 7 Earth Cluster, 7 Fire Crystal and 5 other kinds.

The chain crosses four disciplines — Armorer to Lv 60, Alchemist to Lv 60, Blacksmith to Lv 60 and Leatherworker to Lv 60 — so no single class can finish it unaided.

4 of the 7 raw materials come out of the ground, and 3 of them are time-gated: Cloud Mythril Ore (2:00, 6:00, 10:00, 14:00, 18:00, 22:00), Clary Sage (0:00, 20:00) and 1 other. The widest gap between consecutive opening times is 4 Eorzean hours, about 12 real-world minutes.

Of the intermediates, Griffin Leather Strap has the widest use: 38 recipes call for it, spanning four of the eight crafting classes.