Ask Stacy Blackman

[size=Normal]Hi folks,
1. 27y/o Indian M
2. WE - 5 yrs (Consulting - non IT), working in London since the past year
3. GMAT 710 GMAT and 6.1/10 CGPA
I applied to Darden, Duke and Tuck (November Round) in Round 1 and haven't got an interview invite from Duke or Darden yet, which in turn makes me pessimistic about Dartmouth. What are the groups views on round 2 strategy for a candidate such as me? Shoot for similar tier (Ross) after retaking GMAT? Lower tier schools with same score in R2?
Thanks for the help.