Diadochos Shield ★★★★

Taken all the way down to base materials, one Diadochos Shield is 2 crafting steps deep and needs 3 intermediates — Dark Cherry Lumber ×1, Grade 8 Vitality Alkahest ×1 and Softsilver Ingot ×1 — which resolve to 8 distinct raw materials totalling 18 units, plus 24 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 18 are burned by the intermediates, so the real crystal cost is 6 Earth Cluster, 6 Ice Cluster, 3 Fire Cluster and 3 other kinds.

The chain crosses four disciplines — Armorer to Lv 90, Alchemist to Lv 90, Blacksmith to Lv 90 and Carpenter to Lv 90 — so no single class can finish it unaided.

4 of the 8 raw materials come out of the ground, and 3 of them are time-gated: Dark Cherry Log (2:00, 14:00), Lovingbloom (0:00, 12:00) and 1 other. The widest gap between consecutive opening times is 8 Eorzean hours, about 23 real-world minutes.

Of the intermediates, Softsilver Ingot has the widest use: 53 recipes call for it, spanning seven of the eight crafting classes.