In my opinion you should vote to reopen even when you’re biased. It’s a good idea to add a comment for reviewers explaining why you think the question should be reopened, how dupes don’t match etc.

Asking on meta certainly brings attention to the question and your endeavor, but it is a bit much: A VTR which puts it in the review queue should rather be the way to approach the simple question “Should we reopen this or not?”, especially if you don’t need to raise points not fitting into a comment on the question.