Dwarven Mythril War Scythe

Taken all the way down to base materials, one Dwarven Mythril War Scythe is 2 crafting steps deep and needs 4 intermediates — Dwarven Mythril Ingot ×2, Dwarven Mythril Nugget ×2, Tuff Whetstone ×1 and 1 other — which resolve to 7 distinct raw materials totalling 28 units, plus 56 crystals.

That bill outweighs 9,936 of the 13,602 recipes tracked here and 1,152 of the 1,932 Blacksmith ones, and 4,464 recipes nest deeper.

Only 14 of those crystals go into the final step; the other 42 are burned by the intermediates, so the real crystal cost is 21 Fire Crystal, 21 Wind Crystal and 14 Earth Crystal.

The chain crosses three disciplines — Blacksmith to Lv 78, Goldsmith to Lv 78 and Leatherworker to Lv 76 — so no single class can finish it unaided.

6 of the 7 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, Dwarven Mythril Ingot has the widest use: 168 recipes call for it, spanning seven of the eight crafting classes.