It is difficult to estimate the exact rank as it depends upon the relative performance of all the students taking Kiitee this year.With 200/480 you can expect a rank something between 5–10k as it turned out for last couple of years.Now,with this rank getting CSE will be tough cause its cut-off usually is within 5k. Apart from CSE you can get any other branch of your choice.From last year, the University has introduced some new branches like :

• Aerospace Engineering
• Mechatronics Engineering
• Production Engineering
• Electronics and Computer Science Engineering
• Electronics and Control System
• Communication Engineering
• Medical Electronics Engineering
• Computer Science & Communication Engineering
• Computer Science & Systems Engineering
• Chemical Technology
  
  So if you are the one who is interested in CSE domain then I suggest you take up IT which is the next sought-after branch if your rank does not permit you to take up CSE. Apart from this the newly added course like Computer Science and Communicatiton Engineering and Computer Science and System Engineering contains a mixture of both computer science and communication/system subjects. These are new branches and are of relatively new domain. So take your decision keeping in mind the future prospects and obviously your interest and passion.
  
  Hope you score a good rank and get your desired branch.
  cheers!!