Be aware that some sorcery powers use implements while the bards use weapons. You might be better off using a dagger or a main weapon and a dagger in your off hand to use other the sorcery powers. Another option is to take Arcane Implement Proficiency and take swordmage's heavy blade. (changing you path of war background to be proficient in Greatsword). That way you can use it as your implement and to bash your opponents. Your magic weapon's enhancement would then effect your spell damage as it is considered your implement.