That's a very strange prediction for several reasons:
The "others" that are currently polling at 6% (all EU polls conducted so far are by a single pollster !) will not materialize on election day IMO.
I think those are former Green voters from 2014, who are now unwilling to declare their leanings. They will likely not vote Green again, so either NEOS or ÖVP or stay home (that's why I think the ÖVP is significantly underpolled right now for the EU elections.) The ÖVP usually does better in EU elections than in national elections.
EU-STOP (well, their strange, excentric fundie of a party leader) wants to run again, yes. But first they have to collect 2.600 signatures again and then hope for another miracle like in 2014, when they polled 0.5% and ended up with almost 3%. So, a big "if" here ...
Your other results seem to be OK, but I think the SPÖ will do quite badly this year.
SPÖ will pull in a large portion of the 2014 Green voters considering their more "progressive" party line since they are running as an opposition to the current ÖVP-FPÖ coalition, which is not as popular among Green voters.
ÖVP are not running a candidate as charismatic and, more importantly, not as national-conservative as Sebastian Kurz. He has criticized Kurz for going contrary to the direction of the EU and putting national interests in first place.
FPÖ might be able to profit off that fact somewhat, however, the low voter turnout will disadvantage parties whose voters have low faith in politics or come from a lower social class.
Smaller parties like EU-STOP tend to not pop up in the race until a short time before the election, largely because they lack the budget for long-term campaigning and media coverage, plus they are benefiting from the flip flops and inconsistencies in European Parliament decisions by the FPÖ, such as opposing the ban on Glyphosate and abstaining from the Article 13 vote.