hey subhash 

AIIMS entrance test is going to be held on 25 and 26 may of 2019. i think you should focus more on preparing for it. you should be determined to clear aiims entrance in a single attempt since you expecting impressive marks in NEET. just focus more on yoor studies. cover all 11th and 12th important topics in all three subjects. improve your general knowledge. you will surely clear aiims in first attempt. just be determine and don't lose focus. 

thankyou. goodluck. 

Dear Sir/Ma'm, with a score of 468 you can try and get into MBBS this academic year only. Maybe you have to wait till the third round of your state counselling, but you have chances of getting a seat. AIIMS entrance test is much tougher than NEET. So, give a year drop only if you are very much confident about cracking AIIMS.