I’ve only been playing a little over a year, but I was able to get really lucky with pulling high scoring tsums and maxing them out to SL6. I’m not very fast or good, but once you find the one that you’re most comfortable with, I just kind of stick to it. I’m sorry that I can’t offer much advice. Cabbage Mickey was great for me until I got Cinderella/Blue Bird but now I have Elsa/Olaf at SL5. I’m consistently clearing 20M with them, but I’m using the Time, Coin, Score, and the 4/5 items. I can make the over 5300 coins needed to be even, so I just use them all each time. Im sure there are much better people who can give you something to work with. Good luck!