Sending you friend requests from my multiple accounts. I hope that's ok.>>583761
I'll assume you're not a new player.
There're 3 events currently:
Australia (a rerun) has three mission types. Earn coins to exchange for the items you want. Get S rank, or ruin your earn rate.
1. Missions with multiple battles like story/free mission. Stamina is based on your team composition. Completing these unlock the other mission types
2. Single battles: 80, 100, and 120, with proportional coin rewards.
3. "Challenge" fights: 10 stamina each, use coins, and earn coins in exchange. Can only complete each fight once a day(can try as many times as you want).