Pairing the fastest with the slowest ship in the Chaos fleet is kind of tricky.
The Repulsive does go well with a broadside fleet (Carnages, Devestatations, Acherons, Desolators). The torpedo will just be an incidental weapon for the one of shot when uses as torpedoes. With Chaos you can launch boarding torpedoes. These can make a 45* turn every turn.
You just need to fly the 25cm ships a little slower.