To get to the next mindpower level, you need to win a certain number of battles. In the case of mpl 3 to 4, it is 100. The system also tracks experience points earned. These seem extraneous.
A particular problem develops if you are of herioc stature. That is, if you tend to fight big fights rather than certain victories, you accumulate more experience points faster. The problem is that the system maxes you out on exp and you gain no further benefit from winning battles until you get 100 wins.
This seems to cap how far you can develop your character and your arsenal of creatures. It would seem that those who choose evenly matched fights and greater challenges to secure their victories should be rewarded more than those who only attack when guaranteed of victory.
Whining status: complete.
K