So what Phoenix Squad member do you NOT usually use?

If I'm playing GW, then I usually sit out Chopper simply because Sabine hits harder. However, on TB, I always sit out Sabine for the staying power that Chopper adds. So it's really all situational. I used to leave out Zeb up until I realized just how needed he was for the protection and stuns. So Zeb is my favorite currently followed up really closely by Ezra.