Jocasta I have heard was a Council member until she retired to take over monitoring the Archives.
can Vos beat ROTS Obi or Anakin? i doubt it but....
I will agree with Jnaus. In Light and Dark Agen Kolar beat Vos, so there's no way Vos'd beat kenobi or Anakin (ROTS).
As to this fight itself, Sora and Master Nu, for sure. Jocasta Nu isn't a terrible duelist; she was an active Jedi and a Council member before she retired her former status to become the librarian and manager of the Archives.
And Sora Bulq at this point in Obi-Wan's career would defeat the Jedi on his own, although it'd be with trouble.
So basically, Obi-Wan's going way down.
And someone a while back posted that Sora survived a duel with Mace. Uh, Mace had dislodged one of his lightsabers and Force-pushed him into a stone wall. Pieces of rock were shattered by the impact. Bulq was incapacitated, but when Mace sensed danger for other Jedi in the vicinity, he left. Sora isn't in Mace's league.