I am still working my way towards the first Final Knockout round with all three of my flowers. My strategy for this round was: Just do enough crushing to make sure I end up in the top 5.
It's been boring so far, but maybe the next round will be harder. I might have to decide which of my flowers will make it to the Final Knockout rounds.
Sunflower is losing gold: I had just over 3000 gold at level 2000 I think, that was the peak. By level 6500 I'm down to 767, so not good. The game really has become a pay to play game, so I do wonder if any non cheater can get to the finals without paying a lot of money for gold bars.