The growth and wisdom orbs are often game changers for new and mid-game players. And as an end game player, I’ve gone back to using the growth orbs for leveling up the new weekly troops and mythics to save my souls for the vast amount needed to gold medal troops to advance my kingdom power on the way to power 30.
Just like treasure maps, if you don’t need them, store them. They may come in handy for you in the future.