switch between fire state (cards give more points but take away more of your health) and battery state (cards take away less of your health but give less points) and use the plant cards when you’ve switched enough times as it gives more points the more you switch between the states
also the star cards give stacks and when you reach 10, the next turn you can play like 3 cards and just bomb the bosrd with points. do the tutorials they give out for sena they reslly help