I just don't like how this game is set up... you have to basically know the exact setup and research every wave to have a chance at meduim and harder maps...
Double crystalization = op... game got 2x as easy on boss fights, just use it not stop on the strongest unit and set one of your guys to full force... crystalize one guy indef.
Most of the skills that increase str etc etc are really stupid after you think about it. 20% str for 4 turns... that's not work the increase in damage over losing an entire turn :/ should be atleast 5 to balance out...