You know what though, they keep coming out with other stuff just as good. Since you have lily, she can be used for most battles where you need green-white or purple-white - so even if you missed white rose, bride from valentines, and boo from Halloween, use lily. If you had missed lily, there will be something else.
April fool's had mischief - same colors as headless from Halloween. If you missed all the purple-greens witch, zombie and whatever I'm forgetting - then hopefully you win tourney.
The pink-white valentine and chocolate were good, but melody and tiny are both breedable. If you pair virtue plus red-white-blue like good witch, you also have the chance at diamond without adding too many other possibilities. Plus a chance for blue moon, and super rare or better blue-white dragons are hugely useful.
Good luck with your battles!