It's either Luke or Sidious going vs. Valkorion, and the second one against the other 4.
Luke or Sidious win against Valk in the end; among the other 4, Thexan and Senya, while really good, are weak links against somebody of Sids/Luke level. Just like somebody as insane as Fisto was nonfactor against Sidious. Hard and good fight, but team 1 wins 10/10 probably.
Add in Outlander tho, and it turns to 1v5 to the second combatant, with 3 being able to maintain some response. Eternal Family may have a shot for a slim majority then.