I am seeing them in the Diamond leagues. Just makes it that bit harder to progress when you keep meeting them. At least I can beat them a lot of the time.
I am trying to level up some of my cheaper cards to make them more effective. An extra damage point can help. Levelling up the summoners tends to get expensive. I may reserve some Hive rewards for upgrades. Maybe should have spent more of my Steem on that, but it's all converted to HP.