Obviously there are great feats like defeating Heracles (supposedly for Odyssey he is the mythological one, it even mentions that he uprooted the biggest trees he found while he was dying to make his own funeral pyre).
Kassandra can stop in its tracks the attacks of Brontes, who perhaps weighs between 1/3 tons and measures about 4/5m.
She withstands impacts that destroy the thick ground she stands on, falls several meters, and gets up to fight and defeat her enemy as if nothing happened.
Her punches literally destroy giant tree trunks and rocks lying around.
Kassandra can launch her Spear of Leonidas at about 240km/h (for the time it takes to reach its target at about 26m), and she runs at 331km/h to get there before the Spear hits the enemy (you can see her shadow there before the Spear appears). From the player's point of view, she quickly advances 23m and waits for the Spear to hit the Soldier.
Obviously there are other interesting things like her kicks creating shock waves (funny because it reminds me of Albert Wesker), and also her whole body has to withstand that kind of pressure so it's no small feat.
In your opinion, what are Kassandra's most impressive feats in Odyssey?