What is the smart vote gonna be on Sunday?

I am a bit conflicted. The wahlomat suggested i should vote "Piraten" but since they dont have a chance it would be a wasted vote, wouldnt it?

Now its either "Grün" or "Linke" and since Linke seems to have the higher % i should go with them to make them an even stronger opposition to the afd/cdu, right?

But its kinda hard for me since they wont actively support the ukraine. Which is important to me!

Should i still vote for "Linke" or is it just as good as voting "Grün" ?