dear bro, as you've got the experience of CE-2011 and you must know that CSS is a nerve test. I'm sharing my own experience of CSS-2009, KPPMS-2011, CSS-2012 and CSS-2013. Though my first attempt was a bit haphazard and failed to qualify even the written part but the later three attempts were carefully planned but still I failed to qualify, barring KPPMS-2011 where I couldn't secure allocation. So I'll advice you to go after the exams where luck counts more than planning and preps. I think Machiavelli was wrong when he said that half of fortune always remain in our hands when it comes to CSS.

Good luck bro.

__________________
"Success is not final, failure is not fatal; it is the courage to continue that counts" (Winston Churchill)