Joker's Song was absolutely fantastic. However, don't put down Mind of the Bat Gav, I still love that one and listen to it regularly; it may not be a sweeping orchestral track, but it definitely creates this sense of mystery and night-time which is so inherent in Batman, and it struck me as Batman's mind actually becoming fractured, like all these villains are getting to him, and the sheer chaos and ludicrousness of the one night Arkham Asylum took place in is causing him to break down. So no, don't place one over the other, both of your Batman songs are great.
I actually do have a question about your bandcamp web page, and the album covers you have there; who does the artwork for you? I really like the Level 1 album cover, and Joker's Song artwork is really well done.