@Muser
I prepared for Indo-Pak conventionally i.e. I didnt write anything controversial just plain facts and all pertenant information. I cannot endorse writing controversial facts can earn you marks, not sure about that until I get my marksheet and find out how I have scored in this subject.
I think Indo-Pak is a good subject. It is going to help you in various fronts if not everyone of them. Especially in interviews, people tend to discuss Pakistan history so if you have Indo-Pak and manage to make your way all the way to the interviews, you are good there. Furthermore, Indo-Pak is not difficult to prepare; sure its a bit lengthy depending upon how much detail you really want to include but its managable in fairly short time like 15 days to a month.
In the end, I would like to wish you best to luck in any and every subject that you choose.
P.S: Sorry for the late response. May the great force watch over you. :)