Doom is pretty free to itemize based on what the game needs. Generally you want to get phase and then I'd play it like this:
Offlane- (Midas if flush from kills) Drums, Vlads, Shadowblade, Silver Edge (BKB after Shadowblade if needed), Extension item like Aghs or Refresher or Octarine
Roaming Support- Buckler, Drums, (Pipe if needed), Vlads
Core- (Midas if flush from kills) Drums, Vlads, Silver Edge, (maybe Echo Saber now?) AC, Heart or Radiance
I'd probably throw Blade Mail in there now, replacing Vlads with it.
I don't think Tranqs is good on Doom even though people love to build Tranqs on Doom, Phase is better.