Won't Hail of Blades end up being completely broken on Vayne?
HAIL OF BLADES Gain 50-100% (at levels 1-18) attack speed for the first three attacks made against enemy champions.
NOW NOT LATER If more than 1.5 seconds elapses between attacks this effect will end
CANT STOP WONT STOP Hail of Blades allows you to temporarily exceed the attack speed limit
COOLDOWN 5 seconds out of combat
I mean, if that 2.0+ attack speed Vayne suddenly tumbles on you and is able to hammer 3 attacks into you in less than a second you aren't gonna have a good time.

while not having to spec AS, giving the full AD from Domination + Sorcery or Domination + Inspiration
potentially seem the most problematic