A 750km range missile can hardly be used as a strategic weapon. This kind of short range weapon can only be shoot from somewhere close to your enemy border or coast, which greatly increase the possibility of being discovered and destroyed. So, they are generally the first to be used or the first to be destroyed in a war.
There are no way that Agni 5 has that level of CEP even though your scientisits claim so.The latest Russian Iskander missile with far shorter range (400km) gets that CEP (5m-7m).
http://www.strategic-culture.org/ne...nder-m-missile-system-credible-deterrent.html
If a 5000km missile can achieve single digit CEP, you basically claim that your missile technology is 20 years ahead of any country on this earth. Here is some other examples in public sources:
M51, Range-6000km~10,000km, CEP: 150m
DF16, Range-800km~1000km, CEP: 5-10m