It's very easy to balance Vayne. Make Silver Bolts do bonus physical damage based off of (bonus) AD instead of true damage. Problem solved. Everyone is happy.
While we're at it, make Riven's shield scale off of health instead of bonus AD. Another problem solved.
Such easy solutions, right? Discuss.
Fair enough, little tweaks solve big problems.
I'd even allow the % of maximum hp in the form of physical damage, or magical damage, whatever they desire. I'd also accept true damage based on a % of bonus AD, but % of maximum hp true damage is absolutely absurd.
How do you counter true damage? Build more HP. How do you counter lots of HP? Give % HP damage. To have both on the same ability is absurd.
Wrong.
She will be just as good aganist squishies while being useless aganist tanks.
And she is suppose to be strong aganist tanks, not squishies.
make it proc for magic damage. This way she isnt shredding people but its still difficult to itemize against her
It's even more easy than that.
.
Nerf 
