Aslam o Alikum
I wanted to inquire that which course of action is more preferable regarding the preparation of all the subjects?

''Selective Topics or Complete Syllabus''

Now by selective i mean taking Past 10 years papers and then selecting topics before preparing them thoroughly,as i have seen some interviews of toppers like ''Sir Usman Ghumman'' he also suggested that
''one should take the above mentioned strategy because preparing whole
syllabus is going to take ages.''

Moreover when you are going through past 10 year papers you actually complete 80-90% syllabus i think !

And by complete syllabus i mean preparing every single meticulous topic

Also there are 6-7 months left so do consider this factor before answering .