How exactly do you calculate the bet on each monster? Formula: Our bet * (current bet on monster / sum of bets) I agree, it's complicated especially since the bet changes, but you'll get used to it quickly once you figure it out Now let's touch on what can help you even profit from this, namely - win/loss statistics for each monster For this, I keep a table from the previous duel arena, and some monsters are truly stronger against certain opponents So use it - just copy it for yourself and slightly adjust the bet depending on the winrate But remember that randomness is quite common here, so don't go all in