Brother if have decided to go for indo-pak......
Then
Get yourself the Indo-pak past papers of at least 10 years....
Go through them thoroughly.....
Make a list of all those questions....
Mark those questions which have been repeatd again and again and again...as they are of utmost importance.....
but it doesnt mean to ignore those questions which have come only once.....
Fully prepare all of them.
I would recommend Indo Pak histroy by K.Ali and suhail Bhatti.....
NOTE:
While attempting the question keep the pattern of the answer as in K.Ali's book....
I covered indo-pak in 16 days....with this strategy......