Not tactical but sub strategic .
The big guns like Shaheen series carry 100kt + yield warheads, weighing 500 kg to 1 ton,depending on new or old design. Raad and Babur carry warhead of 50+ kt yield weighing about 300kg.
But likewise every Agosta 90b can carry four of these without compromising anti ship role. So in theory there are at least 16 Babur SLCM out at sea at any given time. That's 800 kilotons of blast yield coming from the sea.
Then the land assets will also be available even in case of Indian first strike. Reason is the land based missiles are mounted on all terrain mobile vehicles which can go hide in far off places.
Such well distributed second strike capability will give nightmares to any adversary.