I haven't been able to follow this election even nearly as well as I wanted, so can't base these numbers in any serious analysis. I also realize that in Austria the last polls tend to give a quite accurate prediction of the final result, so some of my numbers are more like wishful thinking. Anyway:
SPÖ 28.2%
ÖVP 22.7%
FPÖ 18.1%
Grüne 15.6%
NEOS 4.8%
Stronach 4.4%
BZÖ 3.2%
KPÖ 1.7%
Piraten 0.9%
Others 0.4%
To support this kinds of claims, let's see. Both SPÖ and ÖVP have done relatively well in debates and considering that Austria has the lowest unemployment in Europe, one can't seriously accuse them of managing the country badly. Still, some of their former voters choose the more liberal alternatives, Greens and NEOS, giving these parties advantage. FPÖ and especially Stronach have been more like a farce in the debates, they're going to underperform the polls.
To see what I hope the post-election developments to be, just note that a result like this would, apart the continuation of SPÖVP, also allow a SPÖ-Greens-NEOS coalition