Sincere suggestion!
I had Indopak in my first attempt. It is "not scoring". It is bitter truth. If you equal earth and heaven in indopak, they don't award desired score. It is my personal experience. Opt US History, very easy to the point and ever green scoring. You can prepare it into 10 days. I opted it into my second attempt and it will be one of my optional subjects for CE-15 too inshallah.. I suggest you to opt US History and leave others. I assure you that it will give you good score inshallah. Rest you are master of your own decision.
If you want to opt indopak... Here is my notes, hopefully it will help you
http://www.cssforum.com.pk/css-optio...ss-2014-a.html
http://www.cssforum.com.pk/css-optio...cs-2014-a.html
Be Blessed