you dont have to play as 5ds for every duel, just the turbo ones. so just switch between them if its that big a deal for you. also i recommened auto dueling, makes everything easier
Well it's 5Ds event. Of course they ask you to play using 5Ds characters for maximum amount of reward.
Also auto dueling doesn't make it easier, auto dueling simply makes it automated, as in, the AI does the exact same work for you instead of you doing it by yourself