GRob returning at LT is a non-starter for me as is Saffold with his injury history.
Kalil has had some recent issues with injuries as well, but he's at least shown some competency at the position and is still relatively young. I read an article recently indicating that he'd like to return to the Vikings, but I'm unsure if that was for PR or not. I'd love to see if he'd take a two-year deal to return to SoCal.