Cass is in the comics the best Martial Artist (with the occasional exception of her mother but they really alternate but in the end Cass will win)

Cass can by far beat Batman in a straight fight. If she can see or hear him, possibly even smell him she can beat him.

She can take almost any punishment up to and including being shot, and not slow down.

She is so fast and strong several people have mistaken her for a meta human. She is to the best of my knowledge the only non meta human in dc to be able to dive bullets once they have left the barrel.

Cass verse Batman is hardly a contest, Cass wins.

Okay, she is about the best fighter this side of Val Armor, but Bruce is smart enough that she isn't getting anything close to a straight fight.

How would she deal with Deathstroke?

@Dr. Nice same way she beat him in Batgirl 2008.

I would like to at Bruce has even admitted that Cass could beat him and in there first meeting it show her beating him. Without a straight fight it would take longer but she knows exactly how he thinks exactly what he would do and how to counteract it.

Cass is Batman in steroids.

She beat him once, would it always apply? I mean he has single handedly taken down The Titans multiple times.

@Dr. Nice since the she has got exponentially better. If somehow Bruce managed to beat her once she would get better and then flatten him, she is stubborn smart and even more dedicated to the no kill rule than Bruce. She would stop at nothing to beat him. And in no way is Bruce even if somehow managed to beat her coming out without it being incredibly close.

Cass would rather die than loose. Short of killing his adopted daughter Bruce could not win and even then he probably would not be able to kill her.

Bruce and Slade are masters of "preparation". A defeat is merely a challenge to them.

@Dr. Nice she still beat them both and they are both yet to have rematch. Bruce also did regular say Cass could beat him in her original run and No Man’s Land.

Seeing as neither of them have tried to fight Cass again after they both lost it was not part of some grand plan.

Only the odd meta human has ever beaten Cass and then she came back and beaten them latter, often in the same issue.

If Bruce really wanted to beat her he would have to bring the rest of the Batfam to try to overwhelm her with numbers and even then if the first few second half would be done for the rest of the fight Duke would probably be her biggest threat as he is a meta but and with the numbers and Duke on his side Bruce may just beat Cass. She is of course then going to escape and beat them all up on her own terms, duke the fight will last a bit longer but Cass would still win, she would then beat Bruce after having neutralised the rest of her family.

This would of course not happen as Cass would be unlikely to want do this and Bruce would be unlikely to get much of his family on his side to take her down. (The only exception being the period Cass was drugged by Slade. She did latter beat Slade up and beat once more and this arc is not a very good arc at all as everyone is acting out of character Bruce most of all.)

The fact is Cass can body read so well that is basically mind reading she knows exactly what you are going to do before you even know. This goes for Bruce as well.

Cass beat superboy with her hands alone, no special weapons no special moves she just broke through his tactical telekinesis and shattered his nose, whilst not as impressive as fighting superman and winning Batman always needs prep time to win against superman, Cass beat superboy with out even thinking.

She also almost beat Supergirl whilst completely drugged of her mind to the point of total insanity and the only reason she lost was because she so heavily drugged she hardly knew what she was doing, if she had not been drugged and had been fight her of her own free will Supergirl would have lost.

Now I’m not saying she could beat Superman, to the best of my knowledge they have never met but she could be beat Batman. Cass has no extra special weaknesses beyond the fact she used to hate herself and want to die (Shiva killed her then brought her back to life to help her get over it.)

Bruce would need a several month long campaign of constant guilt bait and some how managing to drug her (the only reason Slade’s plan worked in the first place for a time is she had never met him prior to the attempt and Cass regularly sees Bruce) to even stand a chance against Cass, and even then she would not willing loose but the battle would at best for Bruce end in a tie.

In the end Bruce is just a man, and whilst Cass is just a woman she is also the best fighter and martial artist in DC Full stop. She has beaten fully grown and trained Amazons up on mass. Telepaths struggle to read her mind as it works in such a different way to anyone else.

Cass is her adoptive fathers (Bruce) daughter she like him is ridiculously over powered. But she is in text explicitly stated to be able to beat Bruce. By Bruce. If Bruce has said she could beat him (on their first meeting and this was after he had trained with Shiva and before Cass had done that as well) and latter on he still says it. Bruce is probably right in this case,

Bruce when knows he will loose to Cass why don’t you?

So she took Wade in his Ikonn Suit, and Batman with his typical strategies, in their own titles? Or did she win because the writers has it in mind?