This is a good combo, but go for punjabi only if you can comprehend and write it. BA is all about scoring and not subject selection..just take a look at the subjects of the toppers..all of them had language subjects like Punjabi, Arabic, Kashmiryat, Persian etc. If you want to opt for history go ahead, but don't expect good marks in it.

As for Indo pak history, in CSS half the syllabus is related to Delhi Sultans and the Mughals which is not in the BA syllabus. So, you won't be missing out on much..if you don't opt for it in BA.

Last but not least, if you are doing BA as a private candidate from Punjab Uni, you're chances of getting a 1st Division are like 5%. They will deduct marks in English or Islamiyat to lower your grade. I scored 86/200 in English..even though I got an A+(90%) in my O level English.

My overall score was 472/800 (59%).