With a JEE Main Paper 2 rank of 29,930, it will be tough to get into top government architecture colleges like SPA Delhi, SPA Bhopal, or NIT Trichy, since their closing ranks are usually within 3–8K. At your rank, you might still get lower NITs or state government architecture colleges if the cutoff goes higher in later rounds, but chances are slim without NATA.

If you appear for NATA, scoring above 120–130 out of 200 can greatly improve your chances of getting into good state government architecture colleges like UVCE (Bengaluru), Jadavpur University, or CEPT Ahmedabad, depending on your state quota and counselling process. A high NATA score can offset the JEE Paper 2 rank in state-level admissions where both scores are considered.

In short with just JEE rank, options are limited with a strong NATA score, your scope for quality government colleges improves a lot.