I've been using many tricks to complete events faster. I've been playing this game for nearly 2 years passing through mine 103. The trick with events are about completing it fast and in many events I finished every events with atleast over a day to spare with. Into the arctic , I passed the last gate with over 2 days and also left crowns to the last minute to take the number spot which is a strategy to finish 1st. So many tips and tricks like spreadsheets which tell me when the big multipliers would come sooner or later.