Hello,
Aiats is tough to be honest. At this time, it's tougher than neet itself. The last few AIATS just before neet, will give you a glimpse of your exact preparation level for NEET. About the ones going on now, it's just preparing you for the worst so do not be heartbroken if you don't score well. Also, getting around 480 is considered good in Aiats. If you get that year round you can be sure of getting a government medical college seat. The ranks considered topmost are from 1-200 Air. You'll get the best college of your state with that rank in AIATS. Prepare from the Aakash Study materials. Read them thoroughly and also extra books. Just make your concepts clear. There'll always be questions that are not from the aakash matts, do not waste time in finding the answers to those and ask your teacher and get your concepts clear. Focus on NCERT for NEET.