Connoisseur's Bookshelf ★★★

Taken all the way down to base materials, one Connoisseur's Bookshelf is 2 crafting steps deep and needs 3 intermediates — Integral Lumber ×1, Ironwood Lumber ×1 and Manganese Ingot ×1 — which resolve to 5 distinct raw materials totalling 17 units, plus 30 crystals.

That bill outweighs 7,161 of the 13,602 recipes tracked here and 692 of the 1,552 Carpenter 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 16 Wind Crystal, 8 Fire Crystal, 4 Wind Cluster and 1 other kind.

The chain crosses two disciplines — Carpenter to Lv 90 and Blacksmith to Lv 86 — so no single class can finish it unaided.

4 of the 5 raw materials match a gathering node, none of them timed; the other 1 comes from vendors, drops or content this site does not track.

Of the intermediates, Manganese Ingot has the widest use: 134 recipes call for it, spanning seven of the eight crafting classes.