Ca final law and audit

Hello,
I appeared for CA Final in May 2016 (my 3rd attempt)
I got exemption in SFM and scoring 50plus in accts. In all 3 attempts. 
My concern is I have noticed that in my 3 attempts, my marks in Law and Auditing are showing decreasing trend.
As a result, I am not able to clear 1st group.
I want to score good marks in Law and Audit.
I have prepared them from :
Law : Munish Bhandari Sir's Textbook and PM.
Audit: PM and my class notes.
Please give me advice to score good marks in Law and Audit.
Thank you..