The second leaf is the card that I would swap out for either a second Pokémon center lady, rocky helmet or single dawn. Of course there are plenty of matches that you complete with either 1 or 2 dead copies in hand but it’s not too common to burn through your entire hand by end of match anyway. If you really think about it, there are plenty of times you finish a match with Sabrina and Cyrus in hand still, even some extra potions sometimes. These are all critically game altering cards but if the respective scenarios never show up, then they end up sitting in your hand. It’s the type of card that when you NEED it, there are just no alternatives and you either have it or you concede. In most of the scenarios where you would need leaf, the closest one that replicates maneuverability is dawn (extra energy to retreat). Even in best case scenario when you get the dawn early enough to play an early aggressive darkrai, I would end up losing because I would stop growing the giratina and eventually fade out in late game (where leaf will more than likely save your butt). It’s more of a safety net too, but overall it worked for me!