As I see Single Player is really not good for anything other than a way to test a character and unlock maps. I beat everything by myself on Normal despite some levels being seriously tailored towards multiplayer but the reward was I guess... just not having to unlock it randomly, no waiting in matchmaking (yay!) and a bit of gold I spent on lore stuff. So, maybe it was worth it? What mission in multiplayer is worth 20,000 gold with an Antagonist??