Fastest way to get hard badge: buy smite the very first time! this will save you lots of time, just fire both the fireball and smite and you'll kill oponents really fast, making levels easier and advancing faster, playing only once each level (and still getting gold medals).
Don't buy any other spell! you'll need all your points for enhancing abilities, buy ALL divine passive abilities except justice (only 2/3) then buy all fire passive abilities except rapid fire (3/4) and you are ready to kick some ass!
omg endurance mode is so easy that right now I have no factories at all but a huge wall of snipers killing everything before they get close enough to shot them! time is 9000!!!!
It sucks! I CAN'T GET PAS A DAMN DOOR! level 6 or higher and I just reached level 5... now I have to play arcade for ever!!! no! it ain't worth the sacrifice...
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