Greetings of the day dear Aakash

The cut-off trends keeps changing every year and it depends on the number of students attempting the exam, difficulty level, number of available seats, etc. With marks of 185.5, it's not possible to secure a CSE seat in any of top colleges like PSG, Sri Krishna, REC, etc. If you want a CSE seat itself then you can try applying for other colleges. Whereas, you can easily secure a EVE, IT, Mechanical, Civil or any ither seat except CSE in the top colleges that you have mentioned.

You can get an idea about the cutoff for various colleges in TNEA examination. We cannot predict the rank vs. marks as the cutoff changes every year. With the previous year statistics, you can just have an idea. To know the exact cutoff and closing ranks this year, you have to participate in the counseling process.

https://engineering.careers360.com/articles/tnea-cutoff/amp

You can have a detailed glance at the cut-off trends of previous few years from the above link.

Hope I've cleared all your doubts!!

All the best for your future career