I will go ahead and say that for low to mid high rank it is. For the rest not so much. It was the line of upgrades I chose first for my dual blades... It is great against teostra and lunastra as the poisin gets rid of the fire aura and they are weqk to ice when the aura is on. But it being a dual elements weapon meqns that it doesnt get the bonus elemental powers that one element duak swords get. So I guess it is worth it considering the not so hard to find materials.