If you can get 700 it will help you tremendously. If I were you, I would retake GMAT and focus all my energies on the application essays. Your experience level and age group will be pulling your application down. If my math is correct, you will be close to 31.
There is no proven difference between applying in first and second rounds. I suggest you apply when you are ready. I think you are not ready yet. Don't focus on the 1st round. Focus on the quality of your application. You have a fair chance in second round as well. In summary, a 700+ GMAT score is a better bet than the first round application for you.
It is very difficult to comment with such little information about your application success. You didn't mention any 'superstar' achievments that can compensate your weak points. If I have to assume, you have great work experience, especially at Bloomberg, decent extra curricular activities, and good writing skills, I am confident that you can get into the interview stage at least in one of your target schools.
If you have to apply today, it might be better to replace few schools in your list to save your time. Every application takes a lot of time and effort.
>> Any other school I should consider?
Add LBS/INSEAD. They view your experience/age favorably. Good luck!
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