If possible I prefer voting for a small party / candidate even if they have no chance at winning. That way it actually takes away votes from the big options, while blanks are just ignored in the reported results. At least that’s how it works here, the first thing ignored are the non-voters, next invalid / blank votes, and the only thing that matters and gets reported on are valid votes.
The CxU (among others) is working on making those clowns a viable coalition partner by taking them seriously and talking to them on TV. Maybe that’s not their intention, but it will be the result if it continues.