Alternatively, you can also max the Austere element by feeding it 13* fodders of the same weapon kind(if you are maxing a Sword, you need all other fodders be 13* Swords). You will need 30 fodders if you go that route, but depending on the amount of stuff one could have gathered from all these CFs, it could be a better option. You also have the option to use the attribute boosters(5% each; 10% from the untradeables), but I expect them to rise in price again by then. I would save the mats from the 2nd copy to get a new weapon altogether seeing how easy is to get enough fodders nowdays.