I wish you luck in getting the job you desire here or where ever is destined for you. Regarding the test preparation, I believe you know more than I do. As you already, by now, had been through so many of the tests. The thing that you need to change might be the strategy or art of attempting a test. What is generally required along with the preparation is seriousness and focus. People are serious before the test but they become non-serious, loose passion and subsequently focus when they enter the hall. It happens so because they succumb to what they are surrounded by: non-seriousness. Didn't get the point? Let me explain. In a hall of 30 or so aspirants, you would find only a few individuals who would be serious..they won't be eyeing here and there except that there entire focus rests on the answer sheet and question booklet. The rest, and perhaps in majority, would be just trying to pass the time; looking at what others are doing, playing with the pencil or eraser, watching the wall to see how fast the time is passing, asking some rubbish queries from the invigilator and so many other things that you may like to add to this list. So you need to keep up your seriousness, that will force you to focus and passion, you already hold.

P.S. read the tactics as are explain in the book by NTS. First solve Math portion, then English and finally logical reasoning part. Spend more time on understanding the statements in logical part, the ensuing questions would be easy. Otherwise, you would end up doing them all wrong. Don't look at what others are doing. Be serious, focused and passionate.

P.P.S. do analyze meticulously what holds you from getting the desired result.

__________________
The power that signals success is the power of your mind.