Defensive Strategy
One of the first things I discover with a new arena partner is how well they can stop their offensive focus, and go defensive to save my ass. An inability to switch to defensive mode means low ratings. Discuss with your partner what abilities they will save specifically for you (if any). A good thing to do is to play a few BGs before arena, and practice staying alive midfield in WSG. Focus on just keeping each other up, regardless of dps or flags.
Healers: Next time you see your favorite two words in the world, “leaving combat” — consider a quick mount up and drink in a safer place.