We don't need SSBNs to have a 2nd strike option against Pakistan, fighters with nuclear payloads can do the same because that's a thread next door. The main targets of China on the other side are out of reach for IAF, which makes it urgent to have a secondary alternative to our land based nuclear missiles against them. That's where projecting power comes in, which is why we need nuclear subs and capable carriers and carrier fighters, because you send the our force to their area.
BM with increased range does not means its easy to detect. The speed of such missiles isa crucial factor that has made Misisles Shields ineffective. As for the range, we need to be more strategic. Sending our navy around their waters is a lossing strategy since they have developed effective countermeasures for the US Navy. We are fooling ourselves to think that such an act would be successful. As for Pakistan, we never know. Things can always change in a short notice especially if China feels the need to do so. Who is going to stop them? Look at North Korea. Increased missile range is the only safe solution at this time, due to the ability to hide better and further.
We need Agni-6 but not right now. We should give emphasis to Agni 4 and 5 more. After they are inducted into our strategic forces command then we can go for it.
Wrong we should be continuing our research and development. Saying we don;t need Agni 6 now, will f-k us in the long run. When we need it, where will we get it at that moment? I say if we could skip the development of 4 and 5 and go straight to 6 with MIRV's then do so.