Hi AR Ram first of all welcome to TAI
forum, regarding your query you can follow base route
Bangalore-Kholapur-Pune-Nashik-Surat-Ahmedabad-Jaipur (via Chittorgarh and Kishangarh)-Gurgaon
This route is much better than Bangalore - Hyderabad - Nagpur - Jahnsi - Gurgaon
Few years back i had done Delhi-Pune-Delhi twice in my Wagon-R and found the roads in excellent condition. You will find amazing roads in Gujarat and Rajasthan also truck drivers are more well behaved on this route.
From Delhi to Pune you can take halt at Udiapur which is midway