If we win the toss then we should bat 1st and as Shakib says, target 150-160. I think 140 could be enough also. Imrul's gotta take every chance and hit as many boundaries as he can and then in the mean time, give as much strike to Tamim whenever possible. That's been a huge problem for him. He defends with a dead bat while Tamim is waiting to get on strike on the other end and loses the momentum. And then Ash, Shakib and Alok should just bat smartly but of course, be more aggressive as usual.
As for the bowling, making early breakthroughs are very crucial. Rubel's gotta look to take wickets but must be careful to bowl it short. I'm usually against this, but bringing Razzak in to open isn't a bad idea. Maybe he can get a wicket early.
I believe it will be a close game overall. The key is not to panic when batting and also let our spinners work their magic against the Windies as their inexperience towards spin could be a problem for them.