Felt Lining

Taken all the way down to base materials, one Felt Lining is 2 crafting steps deep and needs 1 intermediate — Natron ×1 — which resolves to 4 distinct raw materials totalling 5 units, plus 7 crystals.

That bill outweighs 4,201 of the 13,602 recipes tracked here and 464 of the 1,968 Weaver ones, and 4,464 recipes nest deeper.

Only 5 of those crystals go into the final step; the other 2 are burned by the intermediates, so the real crystal cost is 5 Lightning Shard and 2 Water Shard.

The chain crosses two disciplines — Weaver to Lv 42 and Alchemist to Lv 25 — so no single class can finish it unaided.

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

Felt Lining is itself consumed by 15 further recipes, spanning five of the eight crafting classes.