Whats the point of all this speculation? The hard facts are -
1. India's nuclear weapon tech is largely untested. Cheerleaders may go on shouting from rooftops, but Computer simulations are not the same as real thing.
2. Computer simulations can help only after the tech is mature and frozen - it is for simulating yields, not for simulating tech. Anyone who says otherwise doesn't know the first thing about nuclear.
3. There are serious doubts about the TN. Whats the point of behaving like an ostrich? and where is the dishonour in a failure? Weapon tests fail all the time.
4. Miniaturized nukes are possible, but totally unreliable without extensive testing.
5. Pak's arsenal is probably more reliable - being a tech transfer from China
If Modi gets to be PM, the single most important thing for him would be to resume bomb and nuke missile testing. But it is doubtful he could do that because business lobbies will be scared of reaction from Western nations.