Like the just Concluded Test Series, Indians have to Prepare Turning wickets and we can omit Fast Bowlers and include All Rounders who can Bat & also Bowl Spin - Like Suresh Raina, Yuvraj Singh, Rohit Sharma, Ravindra Jadeja etc etc.
India can Open & Finish with Spin as we Have Outstanding Spinners and Wicket must have Vicious Turn & Bounce from Ball One - Then we can Hope for a Shorter T20 game and we can Finish inside 5 overs and settle the matter as quickly as possible, Just like how The Test Matches ended on Day 3 at Mohali & Nagpur !!!!
Remembering 2007 we beat australia / england / pakistan (twice) so i dont see any issue in group. it depends who plays slightly better on that day. I believe if india keep momentum then very good chances for making it high level.