Besides the obvious elements that the BJP needs (mass leader and an aspirational agenda, to start with), I think that the BJP also needs to craft a new political model keeping in mind the federal structure of India.
The existing approach that the BJP has will probably limit it to a maximum of 200 seats in the best case scenario. (BJP’s previous best at the national level is 182 seats.) Even a national wave for the BJP is unlikely to propel the BJP close to 272 because it is almost non-existent in four key states in India.
A figure of 200 still leaves it 72 seats short of a majority, and it will then entail taking support of 4-5 parties (including allies). That by itself may not help with governance given that key ministries will be given out, and any ally could put a stop to any decision it doesn’t agree with. (Case in point: TMC in UPA 2.)
So, is it possible to create a new construct in India’s political sphere that can get the BJP past 272 on its own?