Got the achievement with Frost Sword, Ninja Headband, Leather Bracer, and Walkman. Had maxed out Power and Accuracy and whatever else into Control. This gives you 6 power smashes, 26 Power, 18 Accuracy and I had 18 Control when I got the achievement at level 17. Also, do what mattesp said with the hitting low and the right click auto forward. Still takes a bit of luck unless you can hit the power smashes every time.
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