A shame no one replied to this, yet. It's very good. You did a good job on choosing the vocals and implementing them. I'd love to hear the finished product.
jsut layer it up with lots of different ones in different frequency ranges.. ive been listening real close to tunes recently and there is almost always a couple of random layers to the basslines.
hmm. The Intro could use some more movement. Cymbals might be a little loud. The drums in general are too bright for that song in my opinion I really like the percussive chops in the breakdown. Why do you wait so long until you bring that cool bass in?