Hi. Looking at the trend of may 11 exams (IPCC), i think that one should not leave any topic. As exams are being unexpected, they can ask anything. Atleast go through all the topics. They can easy questions, or difficult ones, or basic ( as in company law) or not the common questions ( as in costing, fm).
Well best of luck to all for the upcoming exams.
This is just my view. Your opinion may differ. Plan your strategy according.