Sadly I did not chose this but it got a pretty decent score with few features(160). The biggest challenge we faced as a team was finding a reliable cross validation. I think we should start a thread on the best cross validation schemes for this kind of data. I appreciate my team mates @Kuala and @Chinta. Have a read :)
Thanks for the mention @Koleshjr and you really have the competetive sprit to keep moving up the ladder and ran lot of experiments.
Appreciate it :)