Yeah, put a mage on the hill, a knight in front, another knight to the knight's right, and another mage behind. Forming a square.. No resets and I got the hard badge. Use FSeven's upgrades for the mages. It really was a flawless victory, well, ten of them.
Eh, there should be a function that allows you to reset your starter cards once you reach a certain level, such as five. This way people who chose a card that would later become available through challenge would have the ability to fix the mistake.
Eh, should've gotten Rumiko instead of mindreader's chalice, seeing as how its the card of a challenge and Rumiko's challenge was long long ago.
It should really have an auto collect lives feature. Its frustrating when you beat the second to last spaceship and the lag from the explosion leaves you unable to move and you die whilst the big heart slowly floats down.