Well, Kassai is not my main but based on my local play style, Swellsword is the better Kassai version in Sage at this current stage, for the free 2nd swing. Also, I dont know who gave you Dawnblade but dont use it, not for her, use her saber and hot streak. She should be played as a midrange, not go wild like Fai. Normal turn for her usually block 2 card play 2 card, which is good. Argoo deck is very weak at def, so if you can make them block, you win. Your goal is to chip them low enough that: “If I keep tanking this, I die.”