Theoretically who do you bring in though and where to they slot in? 2nd rate offensive defensemen usually lack on the defensive side of the puck which I don't think is what the Oilers would want/need.
Well ideally I'd probably just go with Bouchard as a late season call-up and then head into the playoffs with him as a "black ace"... and plug him into the lineup (maybe running with 7 dmen in some games) to add an extra offensive dimension... especially from the point.
I wouldn't want to expend much on outside assets... maybe a Del Zotto (yes I know he's nothing spectacular)... but something added in that point shot role to add that element to the blue line.
Mike Green would be decent as well if his cap hit wasn't so huge (yes I know he's declined a lot) but again... it's a specific role that I think the team needs and with that added element the team overall could get quite a boost.
DeAngelo would have been a decent pickup as well... but he looks to have caught a little too much on fire offensively so he's likely too pricey to pick up now.
Basically I'd be targeting a dman (with some offensive aptitude) from a non-playoff team who will likely not be re-signing that player and would dump them for at most a middling pick or a B/C prospect.