An IIT background and a 725 GMAT certainly strengthen your profile, but they aren't enough on their own to get into Ivy League or other top MBA programs.
I also think you're asking the wrong question at this stage. Rather than starting with "What are my chances?", spend time identifying the schools whose programs, curriculum, recruiting opportunities, and alumni networks best align with your short-, medium-, and long-term goals. Once you've narrowed that list, it's much easier to evaluate how competitive your profile is for each program and where you should focus your applications.