All subjects are scoring ,you can opt anyone of your choice.
The concept of less scoring should not be given much importance.
In my point of view,if you can opt any regional language subject for instance sindhi ,pashto or balouchi then give it more importance than other subjects containing 100 marks.if you cannot opt these subjects then either go for International law ,I R ,Constitutional law or sociology or journalism (very short and easy subject).
Wish you best of luck