If this includes Damien Wayne, than I see him as a pretty good asset to the Robins. In a fight to the Death, he's easily the most ready to kill, and the most skilled at killing. At a close second their is maybe Raphael, but I don't think he's as efficient a killer as Damien. Dick Grayson is a pretty good strategist, and I'd pick him over Leonardo. That alone sways the odds for them, to me. Breaking them down individually, I think the Robins posses the best team one on one.