Hello Aspirant

It is difficult to predict the leastrank but I will provide the cutoff of nits on the basis of rank for b.arch course.
If you have any questions please go through the below link for knowing the cutoff.

https://www.google.com/amp/s/engineering.careers360.com/articles/jee-main-cutoff-for-b-arch-b-planning/amp

If you have any questions further let me know.
Thank you!!!!