Oblivion Orb
Orb is nice against Vlad. He doesn't have to auto you if you build Bramble, and the armor would be useless too. I think Orb is usually the better choice, but especially here, obviously!
Hollow Radiance
Hollow is nice, as you can shove waves easier, and it gives you some nice survivability, though I would likely build Heartsteel second if you do build this first.
Heartsteel
Heartsteel is great in general, and the extra range and speed on Q makes it easier to poke and catch Vlad. Even better when ahead.