I was just thinking about teams and I was debating which character, Batgirl or Mockingbird, overall gave more for their points. For this scenario there are not theme teams or anything, just basically who works better as filler. I have to say Batgirl. What are your thoughts? Or any better 50 pt characters?

For utility? Batgirl.
For playability? Batgirl
For team ability? Batgirl
For dirt cheap filler to hit theme? Mockingbird.

DC10 Batgirl.

If you're playing hawkeye, them mockingbird can be nasty, but for a non-theme I would always use Batgirl.