How is Bsc LL.B course at NSFU,Gandhinagar as compared to nlus where can it stand in preference list?

Avoid. Just like you should avoid NLUs like Ranchi, Jabalpur, Vizag, Tripura or Assam.

Odisha, Nagpur & Patna? Are they worth it.

Odisha is just about okay if you're not getting one of the top NLUs and planning to get in there and reappear for CLAT, but still want to keep it as a back up option in case the second time goes wrong too. Avoid the other two.