Reply to How much mastering (if any) should I use on my mix?

I'm relatively new to making mixes using Traktor, and I'm wondering if my mixes could benefit from some type of mastering. I use high quality tracks that have already been mastered, but I also add lots of effects and loops (courtesy of the F1). With all the "extra" sounds on top of the already mastered original track, would it be helpful to do some processing of the final mix? Sometimes the final mix seems to suffer from less clarity than I would like. I would appreciate any suggestions!