I don't think that we should move Duffey back to a starting pitcher. Not everyone is destined to be a starter. We may have found a mini version of Andrew miller, and that is just as valuable as a 4th starter, which Duffey is, if not more imo.
Who would your least favorite be? I have to agree with you there, at least Twins wise. I used to dislike Hughes, but I kinda like watching junkballer Phil.