Personally I’d like to see a joint ticket of Pete and Amy. Don’t care who has which role; they both seem to be the closest choices to rational human beings.
Biden for stability, knowledge, and ease of election.
Amy as VP to provide youth, and a female. Would be able to step in, in case the old guy doesn't make it
Amy needs to be on ticket with somebody.
Warren, Sanders, are too far left, and Mike has a lot of baggage. Pete, need a bit more "maturity" and get to obtain more support