Easier method: All points into Attack, use only SAA combo. =Victory.
This may not seem to work on the final boss, but hit SAA when his hammer is literally just about to come close to your character. You will catch him mid swipe this way, which allows you to hit, knocks him back, then its a simple case of standing still, rinse and repeat.
Good game, but some things are a bit flawed. With the "Skadoosh" attck being programmed how it was, you need not ever use a single skill point (putting it into Attack makes the game much faster however) Loved the visuals, and the originality, but overall far too easy, and ever so slightly repetitive. 3/5.