We should be able to form approximately 4 pairs of players, with each pair having a score of 2 wins to 1.
Vitalik and heroes13 agreed to a draw.
After 2 rounds:
Matrosov and Pit - 2 wins.
Vitalik and heroes13 - 1.5
Mizrael, Favio, Vik, Nagan-4 - 1 win each.