The 'Defeat this army' thing needs to be looked at more closely. We are getting into the territory where you paid more coins to complete the quest than you were rewarded. I got a "Defeat this Very Large Army" quest. The chest? Military Genious (3 Rogues, 3 Color Guard, 3 Drummers, or 3 Champions). Between both waves, I will lose more than 3 troops. I actually forfeit the second wave because if I won, I would only have 1 or 2 units left. The reward wasn't worth it. I had the same quest in another world. I won a friggin' Palm Tree and the only reason I even won the dumb palm tree is because I used diamonds to restore units between the waves. I forgot what the chest was. Had I known, I would have forfeit that as well. I'm all for a new idea and I have worked on my military abilities. However, the cost can't be more than the reward.