You can also farm Alexander - "Burden of the Son" or "Soul of the Creator" 4 times for the cog and buy 10 of the Rowena tokens for lore or scripture to exchange them for an 230 weapon upgradeable to 240 or a 260 weapon upgradeable to 270.

You can also farm Extreme Trials "Sophia" for 255 weapon or "Zurvan" for 265 weapon and hope for your weapon to drop or kill it and just farm the tokens for the kills. 10 tokens of the corresponding fights can be exchanged for their weapon.