All Nihil's points are legit, but I'd have to say that I've always found Chalice to be the MVP vs. Red Thresh. Burn can really hurt this deck as everything we run save Slogger can be easily killed by a bolt (if they are smart they can usually catch Raiders when you don't have Hellbent since burn is instant speed). Jitte is a house if you get it going, but it is so threat dependent that that isn't always possible.