Waalaikum Salam ..
Only Islamiat Compulsory and Urdu optional can be attempted in Urdu .. All other papers need to be attempted in English, or in the respective language in case of regional languages ..
Your subject selection so far is excellent .. For the remaining 200 marks go through syllabus contents and find out which of the subjects you got aptitude for and find interesting .. Common choices include a combination of regional language and Sociology / Journalism .. You can mix and match as per your interest ..
First they ignore you, then they laugh at you, then they fight you, Then You Win .. !!