That is awesome! Congrats. I don't think I have ever made it to the Champion tier at all. I will be the first to admit that I really suck at the game though. I never maxed out my cards and I just don't have the strategy down. I am happy to kick around the Gold league most of the time.
It is not bad to learn some of the strategies, but I am struggling to beat the bots, because they rarely choose badly. I have heard from @Slobberchops that his gold set is making it into Diamond.
That is cool. I am still just renting out a lot of my cards. I hold my GF ones back because I use those for brawls. I'd probably do better if I had my good cards in my main deck.
Brawling is fun :)
Probably my favorite part of the game right now. I should have maxed out my deck when I had the chance like Slobberchops did.