Every 1 weapon damage is equivalent to about 8-10 of your base stat approximately. The boost from an i110 weapon to a 135 weapon should be 100+ dps if you include other stat increases. There is no content in this game that requires a 130+ weapon aside from maybe T12/13. I'm not sure what you were expecting but finishing a relic will not make you a god. It just gives you an easy, but expensive and time consuming option to get a top tier weapon with custom stats and an option to avoid coil.