Ok, 2 vs 4, but the four have some weak members.
Hm, Talon could beat Kenobi and Johun, but that'd put Krayt against both Kas'im and Vindican, a fairly formidable opposition. He does have a force edge and the fight'll last longer than Talon's, though.
Though that's just one possible matchup. Kas'im and Kenobi vs Krayt, Vindican and Johun vs Talon would make things easier on Krayt (who'll likely win, odds are high of Kenobi being taken out by the force), but harder on Talon.... though, as Vindican's the primary threat, she can last til Krayt wins.