Im level 78, and on my exp today on the last 5 waves all was 5 star orange monster and last wave all with legenday skills.
I tried every combo for about an hour and no luck with killing them.
Why not make the normal expo go up to your max level toon you have. I just think they scale up way to far past the heroes i have.
Leave the other levels as they are and if a player has 10 hours a day to play let him struggle through it, but atleast give us normal human beings a fair chance of a full set of tokens.