Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
Oh, I thought you wanted something playing in the background for casting purposes. I think that will be a lot easier to create (I just started on my first orchestral piece and got quite an epic melody going, so it shouldn't be hard to do it again).
I can make one that doesn't possess the hard rock that you want. I have an orchestral arsenal at my disposal with an acoustic guitar, drum set, and keyboard to accompany them. I have not started on the theme yet but I have some ideas that could work nicely.
I did use that program, it's just that I was saying "if" you were amazing at using it, maybe you could manipulate the mp3 file of the song to make it sound more like an actual guitar is playing. Fortunately, the electric guitar is pretty much the only instrument that sounds completely fake.
Unfortunately, while I might be able to write some good music for the tune, the instrumentation of the program I'm using sounds wrong (especially the electric guitar). I'm not sure if I can create what you want.
I wouldn't really advise use of persian outside of a fun (?) gimmick. Fake Out and Unnerve are kinda cool, and a unique combo, but other things do these individually better