My DAW, StudioOne, comes with Ampire and RedLight. Of the two I prefer RedLight. Not sure what you're using or what plugins you have access too though..
Screams are definitely better than the cleans. I think you should concentrate on tightening up those drums, and getting the guitars more on time! And wheres the bass guitar? (still tracking)? Maybe pull down the volume of 1 of the vocal doubles for a start. Do some of these things and you'll be in a better mix situation. Hope that helps man