At this point I think every deal is going to be based on price.
We have a few pieces that are "superfluous" pieces which we can sell without much in terms of repercussions. (Umberger is a solid secondary/tertiary scorer and our roster is loaded with those, Brass can become a decent #2 center but has already been passed by Johansen, Anisimov and Dubinsky, and Nikitin is a PMD that has been outplayed IMO by Moore, Erixon, and Golo.) The issue arises when we start looking at players with real "value".
Aucoin: Probably the worst D-man we have Aucoin is none the less partially responsible for the development of some of the kids, and has, by all reports been a major positive voice in the room.
Prospal: The veteran leader we keep him if the return is a third round pick. The issue comes when we get offered a 1st. For the love of all that is good people are talking about a 1st+ for Ribeiro and the same for Jagr. If it comes to that we make a Tkachuk deal with him and bring him back next year (either as a player or as part of the organization).
JJ: Minute munching D who continues to develop into a true #1. Would net the biggest return without question, however advanced stats guys say this stretch of play is not as good as our eyes tell us and that we should unload him ASAP.
Wiz: Our PP with him we look competent, without, well lets not talk about that disaster. He brings a unique dimension to the PP, however he's overpaid and injury prone.
Tyutin: Probably our best all around D-man would bring a solid return and he isn't getting any younger. We would be a worse defense without him, but the drop from him to Erixon/Moore isn't as great IMO as many believe. Essentially I see him as JayBo without the terrible contract (seriously look at the stats over the last few years) and the return for JayBo is rumored to be ridiculous (i.e. a first and an A-levle prospect)
Complicating this more is the fact that there is an "urgency" with the rebuild given that the 2013 draft looks to be one of the best in terms of talent since 2008 and that the next few drafts aren't nearly as deep (Though the guys at the top appear to some truly excellent prospects).
Personally, I trade Tytuin, Nikitin, Brass, and Umby. Put Brass and Nikitin in a Package for a good forward, use Umby to grab a second+, and send Tyutin out for a 1st+ a good prospect.