Batgirl or Nightwing are good options. Batgirl offers some easy solutions to Deathstroke, while Nightwing takes a little more work, but pays off in a big way.
I love the deathstroke mirror.right away, the opponent wants to play the zoning game but once your in, it's free. Just wait for wake-up sword spin, online deathstrokes love the wake-ups.
Batgirl is so solid against DS, that tp basically forces me to only get reaction block punishes, she controls the pace of the game I feel. Does the tp safely escape vortex? I haven't checked.
