practice the scanner 3-4 times...if u still have time do some basic problems from Girish Ahuja or V,K Singhania book....dont get into too much complex problems at ipcc level...try to revise the provisions as many times as u can...practical u can solve easily if u know the provisions...thats my thinking..
you dont have a lot of time... so it is worthless to purchase books for practice... you should revise the provisions thoroughly and then solve scanner.... for basic problem you can prefer either Girish Ahuja or V.K.Singhania... but dont waste your time in solving the difficult or complex problems... I hope you can do well in the exams...