This has worked for me for the past 3 events. get enough event currency to open 4 boxes. Technically, you will only need to roll twice, but leave room for oopsie doodles.
anyways, once you are ready, open up the game. then open up up game guardian. Once you're all set, click on the icon that looks like dice. Checkmark the first option, enter in a value of 1, and then click okay. What you've now done is murdered the random number generator, and ensured that you will get the top prize in the event gotcha
Go to the event tab, go to the event shop, go to Dragon's Coffer, and start opening. Again, make sure you have at least 600 event coins before you do this. First roll, you'll get the best armour of the event. Second roll, you'll get the same thing, so the game will give you 1000 event coins. So since every spin costs 300 coins, but you get 1000 coins back, you get 700 coins per spin. Do this as much as you want until you want to start spinning to collect the prizes. Once you want to do this, open the game guardian menu, click the *****, make sure all options are unselected, save, and then go to town.
