Right now, I think Sobolev means more to the Spits than the return he'd get as an OA/Import dual spot. Last I looked, there are a handful of teams that have potential Import OAs so those would likely be out and the cost wouldn't have been high to begin with (a couple of mid-round picks?).
My guess, in order of highest returns - Christo, Peer, Maillet, Sobo, Jodoin. However, you don't want to just deal Christo AND Peer without significant offensive return. One of them should be a leader on this club in 2023-24.
This isn't going to be an easy decision for Bowler, regardless of what he does.