Really wary about Dost, he's been pretty dire apart from a ridiculous purple patch for Wolfsburg at the start of the year. Most of his goals seem to thrive off good service into the box from De Bruyne/Perisic/Rodriguez and I can't see him getting anywhere near that quality here. Hope I'm wrong but I wouldn't be surprised if he turned out to be another Riviere.
I'd be delighted with two of Austin/Berahino/Mitrovic.