this is a pretty good T20 team... only changes I would make are - drop Sohail Tanvir and bring in a proper batsman...
apart from Malik, we don't have a single player in the lineup who can play according to the situation. on tough tracks and on bad days, all the power hitters we're playing will be back in the hut in no time... and we'll miss the stability a proper batsman can provide.
There are 5 batsmen already and 2 alrounders already (Nazir, Akmal & Akmal, Malik, Alam, Afridi & Razzaq),...you need four full time bowlers atleast. I could understand swapping Tanvir with Rana now and then, but I wouldn't add another batsmen.