I use only one copy of Gamble and Lucky Punch because Gamble activates only if you have 2 or less cards in hand and if you're opponent has 6 or more cards in their hand, and Lucky Punch's effect is if you get three heads in a row you draw 3 cards and if you get 3 tails in a row the card is destroyed. And if the card gets destroyed by any means you take 6000 damage to your LP, which is why I run a bunch of healing cards like Aroma Jar and Cauldron of the Old Man.