We don't know exactly how strong they are, but I kind of got the sense that SSJBx10 Goku might actually have a chance against Beerus, which would also explain the Omni-King's introduction to take Goku down a peg. Considering it was implied that Hit could have killed Goku if he'd been using his assassination techniques, it's possible that Hit alone has a chance against Champa. Both of them combined would destroy him.