We all know how it feels when tanks have %HP scaling on their shields, which make them even more difficult to deal with.
Current **Valor**: 90/120/150/180/210 (+100% bonus AD)
New **Valor**: 90/125/160/195/230 (+70% AP)
The base value would be stronger as the game goes on, but not by much, and it would remove the obnoxious shield strength that she gets just by building pure AD.
A champion with an escape skill like Riven's dash should not benefit across the board just from building 1 stat. Riven players should make a choice between going full AD and not having a strong shield late game, or they actually sacrifice more than 1 item slot to get something tanky.