Understanding Vayne's Power Curve
Lane bully:

Power spike:

Avoid Her:

Late Game:

Hypercarry:


Only still in game because having too much fun camping enemy team at fountain:


Lane bully:

Power spike:

Avoid Her:

Late Game:

Hypercarry:


Only still in game because having too much fun camping enemy team at fountain:


At this point she would probably be better off grabbing Trinity or Phantom Dancer over Shiv.