I'm trying to play as Bengal and I'm not dissapointed for even a bit.
You can become the tributary of Ming for merely 12 MP each year or 30-240 ducats each year. And then start the Asia-Subcontinent business.
Build your own base in Asia and strengthen your trade in Ceylon by killing the lesser tributary states of Ming, like Pegu, Ava etc. Don't even bother to conquer India before that, it will rake too much AE and coalition will wreck you in an instant (Delhi-Jaunpur-Orissa vs You alone is definite suicide).
After you have strong economy, your expansion path is now open with many choices :
1. Ally Jaunpur, crush Orissa, march West and kill both Vijayanagar-Bahmanis to take Goa trade node for yourself.
2. Ally Delhi, crush Jaunpur and Malwa, march North and move your base to Doab area (Doab, Delhi, Jaunpur) and then form Hindustan.
3 of key main ideas for Bengal : +10% trade, +10% production efficiency, +10% tax modifier, there's few nation in EU4 that can top that crazy ideas along with +3 tolerance of heathen and 10% trade steering. And to add the cream of the crop, the Hanafi school provides -5% Admin tech.
My ideas : Admin - Influence - Aristocratic - Economy - Trade - Offensive - Humanist - Quality
Why took Aristocratic? Because of 33% manpower modifier and monthly autonomy decreases. Pair that with economic and you're golden
