Recommended Boosters: the Extra Joker and extra Cards and the extra Time if you are unsecure with your clicks.
Train at round 1 a few times without using any Boosters, that way you can fix that part fast when you go in with the Boosters.
For round 2: Do not use the cards that are spread around the middle cluster before you have a clear path to take out the chained cards.
Please watch this video for Level 57 for further guidance.
