I wouldn't +1 the shield as one drops in Turn 1 iirc, correct me if I'm wrong. If you are to +1 a relic, go for the Sword imo. However, if your group isn't breathing down your neck in terms of threat, a +1 to your relic weapon might not be necessary. Obviously, unless you want the shinies, then I won't stop you as that is a super valid reason to upgrade relic! :P Since you're dabbing in both jobs and are holding out for the Warrior, why not go for the Myth ring first? It'll benefit both greatly.