The argument being made wasn't whether or not Cass got a lot to do in team-ups. The argument was about how Cass works with teams, and my pointing out that there really isn't enough data to make an argument one way or another.
Also, while she was criminally underutilized, I do like some of her appearances in Gotham Knights, a handful of interactions with Dick, although the only time they worked together, just the two of them, was in the Murderer/Fugitive tie-in in Cass's book, several with Tim prior to Bludhaven, most notably Batgirl #18 where they first became friends, and I'm really not sure how you get that number for Bruce when he was a regular supporting character for most of her book...
Wait, were you talking about team-ups OUTSIDE her book? Because that's really not what we were talking about.