Warwick Rockstreamer 5 Set Up

I’m having some issues setting up my Warwick. I have the action set very high and I’m still getting quite a bit of buzz in the middle of the neck. I’ve adjusted the nut to 0.3 while putting a capo on the third fret. I’ve tried to flatten the saddle until the strings sit flat on the fretboard and matched the radius before raising the bridge up, but I still can’t get rid of buzzing. I want the action set fairly low where I can play a bit hard, but still be able to play fast. Thanks ahead of time for the replies!