Use offline mode to test your event progress 
 Just restart your phone if you don't get what you want, then choose a different path
 All attempts will provide the same results, it is not random - Wait until the last 8 hours 
 - Save all coins from the start of the event 
 - Turn off the internet with "airplane mode" 
 - Complete the tower (your ideal path)
 - If something goes wrong, keep internet off
 - Force close the game
 - Nothing will be saved
 - Keep repeating until you get what you want
 - Only Turn internet back on when you're happy with results, and the game will save your progress!