One thing I'm always curious, how do you get out of the prohibition against sailing? I just kind of hand-waved it with the Cholas since they are known to have done a lot of that already.
I am not sure the prohibition existed in the time of the early Vijayanagar in south India. OTL Vijayanagar had a navy that regularly extracted tribute from the kingdoms of Jaffna, Pegu and Tenesserim in time of Deva Raya II (1424-1446). It was after the arrival of the Portuguese that Vijayanagar's navy faded into oblivion. Until then, they existed just fine.