This can be really helpful for you. Although it's for CE-2014, but still worthy enough to mention and follow.
http://www.cssforum.com.pk/css-compu...ss-2014-a.html
One should cover the whole syllabi, but as you need, I think the topics from 1905 Partition of Bengal to 1947 - the early problems of Pakistan- should be prepared in detail. You will be able to attempt 1-2 questions from post-partition era just with the help and preparation of Current Affairs.
Hope, you got the basic point.