Why r1 [Virulent Scourge] and r1 [Vicious Frost]?
You want your viral numbers to be lower than the slash numbers so slash would be a higher proc priority. Remember Viral caps at 10 stacks, so making it the dominant proc priority would make you lose DPS.
Also never run viral heat on a slash weapon, it's dumb. Viral Slash combo will ignore armor, and slash has a better DoT than heat, so adding heat there is useless, you're just taking away proc priority from viral slash combo. If you want immediate damage for low level missions (Lvl 1-120), then just use corrosive.