This is as good as it gets Gylen.
The 200 mm at the top is taking out the hot/warm air which still (could) remain in your case, so it is definately not useless.
The only thing you could do is change the lowest (fore-)fan into a 120mm.
Also you could set all fans to 'max', but then you would have to strap your case down, in case it would take off... and the temps would drop a merely 2 degrees (Celsius). This were my own experiences.
Hence: hardly anything you could do to drop the temps any lower (or you like sitting next to an aeroplane imitation )