You should really learn how to sidechain (if you don't know how to already). It'll greatly help your drums stick out more, and make them feel more punchy, without raising the volume of the drums, or distorting them. Be sure to also take out some of the low-end in the melody/apcapella sample, so that you don't have it clashing with the low-end drill 808.
=========
I'll remix this to show you what I mean. I'll have it be remixable.