If I forget that you're using FL Slayer, this almost sounds sounds like an industrial form of Static X.
Unfortunately, Slayer has a distinct, but horrible sound. There are synth instrument/filter combos that are far better than what you're using.
Keep it up and leave Slayer behind. You'll be better off. Trust me.
I like how you did this song... Unfortunately, I dont like the FL studio preset for heavy metal guitar. Overall this is a good song, I'd just personally like to hear it with an actual metal guitar.
Some vocals would be nice too. :)
Overall, keep up the good work!