In particular, faking support for Bernie Sanders is a bad idea. He might just win on a first ballot if things look too good for him. And he has a solid lock on the Millennial vote. They want Socialism and they will turn out for him.
Far better for us if the other candidates gang up on Sanders and force a brokered convention where Sanders is not the final winner. That will split the party of at least 25% of their voting base no matter who else wins.
Cast your vote based on the 15% rule. The democrats changed their primary systems to proportional voting after the last election. So every candidate gets delegates based on their percentage. They put in a floor of 15%. To get delegates they must have at least 15% of the vote. My theory is that we want a contested convention with as many candidates as possible with delegates. If we vote for the candidate polling nearest to 15% in our state before the primary we can keep as many of them alive as long as possible. I say nearest to 15% because all polls have a margin of error. So a candidate polling 16.5% might only get 14.9% of the vote and fail to get delegates. By keeping as many of these losers alive as possible, hopefully all the way to the convention, we create disunity and distrust. Imagine if we could keep six candidates viable, Crazy Bernie, Mayor Pete, Liawatha, Bite Me, Klobuchar and mini-mike. The convention goes to a second or third vote. Deals get made, hopefully, several of them get screwed over. Disunity and an even bigger victory in November.
My district in Texas has no primary races of interest to me therefore I can indulge in this. By all means though if you have a chance to vote against the GOPe in the primary that is where you need to cast your ballot.