A rank of near to 3000 is must to secure seat into top NITs for Architecture. This correpnds to marks of 250+.
The ranks may vary as per marks on basis of difficulty level of paper, total Students appeared and gheir Respective performance, and previous year trends.

You can use the college predictor for the best possible branch and college

https://engineering.careers360.com/jee-main-architecture-rank-predictor