Island Prism ★★

Taken all the way down to base materials, a batch of 3 Island Prism is 2 crafting steps deep and needs 1 intermediate — Luncheon Toad Leather ×3 — which resolves to 3 distinct raw materials totalling 17 units, plus 30 crystals.

That bill outweighs 7,161 of the 13,602 recipes tracked here and 892 of the 1,844 Leatherworker ones, and 4,464 recipes nest deeper.

Only 6 of those crystals go into the final step; the other 24 are burned by the intermediates, so the real crystal cost is 24 Earth Crystal, 3 Earth Cluster and 3 Wind Cluster.

Every step is Leatherworker work, from a Lv 82 intermediate up to the Lv 90 finish, so one class covers the whole chain.

1 of the 3 raw materials matches a gathering node, none of them timed; the other 2 come from vendors, drops or content this site does not track.

Of the intermediates, Luncheon Toad Leather has the widest use: 88 recipes call for it, spanning seven of the eight crafting classes.