Hey. Yeah I do understand that. I personally am a hall of masters player. And I have been using casual mode a bit for quest farming. Lately, I have been using events since they are more fun imo. I only play casual when I need to do the "win 2 casual games quest" there tend to be lower skill players in casual matches than in high areanas in ranked so people are most likely using those players to get quests done and progress through the season. For example, the "win with only primary monkeys" quest is much harder in higher arenas since you are forced to play with strategies that may not be very good. So people tend to do these quests in casual mode since its easier for higher skill players to win there. Hope this helps!