First of all, getting into diamond with your own account so fast is already great. And getting into champ we all know is a lot about money, but you certainly know what you're doing.
At higher levels, do you think is there an element stronger than others or the game is balanced? I hear a lot about Fire because Yodin Zaku, but would like to hear you.

And a bonus question! Right now I just finished this season at Bronze I for the first time. Don't have much money to invest into it, but would like to know, what cards do you think I should BUY and what are better RENTING?
I had to rent 4.5k power on the last day to get into Bronze I and don't have any deck good enough to call main.