Find the one reward that is behind the doors that you know everyone is going to want to use a gold key on. Whether it’s the best rune or a boost or something else, the best thing that’s behind those doors. Now if you have anything else in there with it take that stuff out and redistribute it into other doors and put in an enormous amount of wreaths. The wreaths will be useless to the people that got to take advantage of the great portal. They already have enough to buy out the event shop, but the people who didn’t get to exploit the portal will get that item plus whatever the amount of wreaths is that you decide on.