So because you don't know much about Kun you write him out? o_O
I still say it is clearly Kun>Vader>Bane>Revan.
I think they would all see vader as the biggest threat because of his armor, so they would all be focused on him. Of course we'll see some Sith treachery in there as well. We might see Bane or Kun backstab one of them in all the chaos.