AOA sister,
yeah u should buy Qureshi's book and k b saeed book.bcoz these r written in a fabulous expression and then try to build ur own conclusion and points.this will help u in developing ur own analytical skills and u will soon become expert in making accurate conclusion.

i m also going to mention some good suggestions below.
u should divide ur days like 15 days to each subject in this way u will do ur whole preparation in 7 month and after that also easily do revision
but start preparation of current affairs from December
but do 1 thing continuously that read dawn newspaper daily .mark all difficult words and find their meaning try to use them in ur daily routine in order to remember them.and u will see that in dawn newspaper on editorial's page
always three separate columns r there they r very short and are on left side of editorial's page try to read it with concentration and then reproduce it in ur own language and also write that what idea u have conceived from it.
then u will see how much u have improve ur english do nothing for improving english except this tip.

hope u have got ur answer .
if any query come to ur mind plz dont hesitate to ask. i will try my level best to answer u .
regards

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“Success is simple. Do what's right, the right way, at the right time.”