I think, looking at his record, you'd probably make a conservative guess that he'd bag 10 - 15 goals in season for us; with a good team around him.
I believe in Waghorn, Nugent, King and Gallagher we already have several players who can do this, and perhaps Howard or Vassell may get double figures if played down the centre on a regular basis.
For me, if we signed him, Sven would be going against his ethos of signing better than what we already have or adding a type of player that doesn't already exist in the squad.
If we aren't going to get a top class forward at this level, I'd rather take a punt on an unproven premiership youngster than an average striker -
Perhaps Nimely from Man City, Sven brought him through in to the first team; scored 15 goals in 11 games for Liberia U20s..???