Grade 4 Skybuilders' Oven

Taken all the way down to base materials, one Grade 4 Skybuilders' Oven is 2 crafting steps deep and needs 1 intermediate — Dwarven Mythril Nugget ×1 — which resolves to 5 distinct raw materials totalling 35 units, plus 13 crystals.

That bill outweighs 11,223 of the 13,602 recipes tracked here and 1,335 of the 1,932 Blacksmith ones, and 4,464 recipes nest deeper.

Only 6 of those crystals go into the final step; the other 7 are burned by the intermediates, so the real crystal cost is 7 Wind Crystal, 4 Fire Crystal and 2 Earth Crystal.

The chain crosses two disciplines — Blacksmith to Lv 80 and Goldsmith to Lv 78 — so no single class can finish it unaided.

2 of the 5 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, Dwarven Mythril Nugget has the widest use: 154 recipes call for it, spanning seven of the eight crafting classes.