Well...
Attack, Barrier, rocket, rocket, rocket, rocket......This strategy was the only thing I did throughout the entire game without fail. To give an honest review this game was quite boring to play through but I kept hoping that some sort of strategy would eventually bring forth itself...but I was disappointed.
If you could create moves and enemies that would actually be hard to kill and create ways to counteract them in strategic ways it would be fun, but obliterating every single opponent that same exact way the entire game gets repetitive and boring, fix that and it would be okay.