Cassie deals an additional 8% of a target's full hp with Big Game. If Raum has his full soul armor at 8k health, she does about 1320 a weapon shot for 4 seconds. That's 5 weapon shots, which is 6600 damage total, assuming she hits all of her shots.

You do significantly less damage than Kinessa, but your stasis field stops her damage, and your ult counters her ult.

Ash's shoulder bash with battering ram gives her damage mitigation against combat trance.

If you go mid-range or short range, Vivian will shoot you down. You're better off keeping your distance. An advantage you have over Vivian is that your heavy blade goes through shields.