I don’t think you really have a lot of choices to be honest.
Therein lies the problem. We don't have a lot of choices. Voting for new, progressive candidates feels great and it's nice to pat ourselves on the back and think we're making a difference, but the fact of the matter is that voting for a candidate who has no realistic path to winning is only even a realistic option when the candidate with the 'D' next to their name is all but guaranteed to win. And yeah, I'd really love to be able to make a statement by splitting the leftist vote between the democratic candidate and a progressive one; I'd really love to tell the democrats to get fucked and vote for a progressive third-party for every seat, but right now is far from the time for that, especially in states where those races are actually close. The last thing we need is to pack the House and Senate with republicans who win something like 40/30/30 because we couldn't unify behind someone who actually had a chance of winning.
Not to mention, we only get to vote in 1 state's elections, and often times there aren't even any progressive down-ballot candidates on the ballot to vote for.