DjM....,
I don't think that you need to bring out the bottom in the kick drum, but I think that you need to add a bassline. Even if its in the back of the kick, you need one. Listening to the kick all by itself is monotonous. You can actually bring that backrgound music (trumpet or whatever it is) part up a little. It's allright where it is, but I think that it would be even better a little higher in the mix. You may also want to double the ad lib vocals by using a delay and panning it on the other side. Right now, you only have adlibs on one side for each rapper. So....
Otherwise, solid production. The vocals are very much under control.
Rev E