I think it would be really helpful if for missions there could be a power level score displayed before you actually attack the monsters. Would be nice if you could try different hero builds and not have use same cards all the time and a general power base displayed for monsters would let you know if your just wasting world energy to proceed. Perhaps after clicking the map and selecting say stage 5, were it shows the monster lineups there could be a suggested power level.
Edited suggestion for easier explanation. Thanks