At present all the 5 singers are too good.
So the winner would be based on regional vote.
My speculation:
1. Hemu - Because he will get the whole South India's vote (1/3 of total vote)+Music lover of all SP.
2. Debu - He will gate the support from 7 Northeastern state+Bengal+Urisha+ Global Bengali support+ Music Lover of Melodies Song
3. Himani - She will get all North Indian Vote, but not Bihar. Himani will come top, if Vineet is out from the competition. Then (2/5) votes from northern India will go to her. + Music Lover of Fast Track
4. Vineet - He will get support Bihar+UP (1/5th Votes). + Music lover of Rafi and Sonu.
5. Nihira- She is the BEST, but it is hard to get huge vote from Maharastra to WIN the battle. + Any honest Music Lover.
But in reality: NIHIRA IS THE BEST