FL Slayer...

You use FL Studio, right?
Well the FL Slayer sucks unless you use it right, and then it still sucks. You have to edit it depending on what you're using it for. For rhythm, you need to usually set it to Tube or EQ for the amp and Combo for the Cabinet. At least with Metal, or else it just sounds like hardcore techno. It also doesn't hurt to turn the lows up and the mids and highs down for rhythm. For solos set it to Solo Fixed or Solo Dynamic and turn up the highs.
And actually, the Slayer also works well as a bass, just set it to Ebass for strings, put the amp on Dry, and set it to Strumming.
Just some advise. Too much probably.
Nice song.