Quote Originally Posted by Zezlar View Post
"The highest-rated treasure coffer will appear upon obtaining a cumulative score of 60,000 or better."

That can either be very good, or also be very bad.
Also from the patch notes:
Bonus points awarded for the following two achievements have been increased:

All Melee Units Dispatched
All Magic Units Dispatched
So, might be a wash. We shall see.