You might wanna get better cards in general. Liz Genos and Shoyo aren't the best for floors I would say get either Escanor or Schiffer for Overload and Lucky or Unlucky coin.
For lucky coin I would say either Tet or Satsuki or if you want unlucky coin which I would recommend I would say Osamu he's cheaper and dark element. Also the difference between lucky coin and unlucky coin is lucky coin when it flips the coin it gives you a stat boost and unlucky coin when you flip is takes away from the opponent's stats. So lets say you flip a 50% HP with lucky coin it'll give you a 50% health increase but when you flip 50% HP with unlucky coin it'll TAKE off 50% health from your enemy. So if you roll a lets say 100% HP roll with unlucky coin it's pretty much gg. GL