Is it just me or does it seem like players are spending incredible amounts of $$ on this game. I play fairly regularly and it seems that when I compare hero power in the fighting pits, I am drastically lower than most in the top 10 - 15. I am all for supporting the game creators with some purchases but there is no way I am spending 100's of dollars. Does anyone have any tips about increasing hero power that does not require major diamond purchases?