Hey there
This year the marking scheme has changed for JEE mains so exact prediction is difficult but since mnnit Allahabad is among top nits so anything around 175-185 would be a safe marks and this marks can assure your seat in mnnit Allahabad.
Check mnnit Allahabad Cutoff
https://www.google.com/url?sa=t&source=web&rct=j&url=https://engineering.careers360.com/articles/jee-main-cutoff-for-mnnit-allahabad/amp&ved=2ahUKEwiA4rz-i_HkAhUBPY8KHTC8AJQQFjADegQIBBAB&usg=AOvVaw2tjnMqw7O79EhPQXLqraMf&cf=1
Good luck
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