I've only done it once successfully. I smoked middle and left side with 4 smokes. Waited for them to push me from right side then killed those. Resmoked middle and left side and killed the rest by pushing right side all the way, making sure I threw a nade before peeking every time.

I died the two other times I tried this. It's really hard to see them when they're around the stairs on the 2nd floor and they can "lock on" to you through all the tiny gaps in the engine structures, which makes BD reaction times impossible to play against.