For a top IB or MC firm you need a 700+. Most schools tell you to put it on your resume, but not the breakdown. So don't worry about the breakdown as much, if at all. If you get accepted w/o a 700+, take it again. It will really help your chances. I know you'd rather put that test to bed, but think about this way: if you don't have a 700+, the resume under yours might, and you are just giving that person a leg up on you. You spend another $250 or more, crack 700, get closer to your dream job, and it is all worth it. Bschool entails a lot of sacrifices, but it is about the big picture, right? If you give yourself every advantage you possibly can, you will come out of school having achieved the goals that you set out to conquer. And if you're not giving yourself every advantage, I can guarantee that someone at your school or another certainly is.
That's my late night pep talk...back to work.