I would probably do that. Tough to know for sure since we have no idea from your post what your roster actually looks like. Timashov is buried behind a lot of good young prospects in the Toronto system. Chances of seeing him break into the top 6 there are very slim. Johns will likely be a top 4 D for Dallas this year. It also dpends on the value of hits in your league, since that is what Johns is going to give you, and not much else. If Radko Gudas is a good D to own in your league, Johns will probably be a good investment.