AD tf isn't using his skills at all. I wouldn't recomment it since your Q becomes useless trough the whole game.
At least AP makes Q viable + improving W and E. AP TF is way better to bd too. I went like this yesterday, they never knew what happened when their inhib went down.
Summoner spells: Teleport + Flash/Ghost
-Nashor Tooth (AS + AP + CD + mana regen.... what more?)
Then I go either Ghost blade if i only BD or Stark's if if want more impact in teams fights (+ way easier to single out 1v1 targets)
Deathcap, Rylai, Hourglass, Void Staff and other AP based items are all good and situationnal.