You have a good chance at all of them. Being a legacy should help you get into Notre Dame. I would be surprised if you did not get in. NYU Stern might be a little hard to get in, given its acceptance rate.
Can you go to my chance me thread and chance me too? I would really appreciate it.
Yes, NYU A&S is easier to get into. I know someone that got in who was about top 20% of their class with nothing too special. I am also going to be looking to apply to Stern and Mendoza next year! Great schools!