One cool thing in Guild Wars 2 is that you can custom your in game music as much as you like. If you get tired of the combat theme, you can basically select the musics you like and use them as the themes instead.
So basically my combat theme will be this:
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Fate/Zero: This was the tale of a man who, more than anyone else, believed in his ideals, and was driven to despair by them.
Madoka: This was the tale of magical girls whose wishes are pure and by them are driven to despair.