Starkiller and Agen Kolar vs Darth Traya and Kyp Durron

Force sabers all out

Kolar can probably handle Duron with his skill

Starkiller would literally almost stomp Traya. Dude defeated Vader and I thimk in the nect game he's going to canonically take on the emperor. So... Starkiller at his current point is only a bit above Vader.