Grade 2 Skybuilders' Grindstone

Taken all the way down to base materials, one Grade 2 Skybuilders' Grindstone is 2 crafting steps deep and needs 1 intermediate — Titanium Nugget ×1 — which resolves to 6 distinct raw materials totalling 22 units, plus 10 crystals.

That bill outweighs 8,402 of the 13,602 recipes tracked here and 849 of the 1,552 Carpenter ones, and 4,464 recipes nest deeper.

Only 6 of those crystals go into the final step; the other 4 are burned by the intermediates, so the real crystal cost is 4 Fire Crystal, 4 Wind Crystal and 2 Ice Crystal.

The chain crosses two disciplines — Carpenter to Lv 60 and Blacksmith to Lv 54 — so no single class can finish it unaided.

3 of the 6 raw materials match a gathering node, none of them timed; the other 3 come from vendors, drops or content this site does not track.

Of the intermediates, Titanium Nugget has the widest use: 112 recipes call for it, spanning six of the eight crafting classes.