So, we are still desperate for a number one dman. At this time in the season and you're struggling, what other teams are going to be looking to trade? Other teams struggling. Here's how I would look at analyzing trade options as Oilers management.
I would suggest our most likely trade partner at this time would be our old friends in Columbus. Anaheim, NJ and LA would be the next likeliest options, IMO, based on where those teams probably see themselves.
What do those teams have that we would want?
From Columbus: Hmm, looking at their roster, I see why they haven't won. There defense is worse than ours. Jack Johnson, or perhaps Fedor Tyutin could be of interest. Tyutin would probably come reasonably cheap. Johnson probably less so. Let's see what else might be out there.
From Anaheim: Cam Fowler is off to a poor start for the Ducks (really, they all are poor stats at this time). Personally, any of Fowler, Lindholm or Vatanen would be great adds. Bieksa too, but I can't see that as an option. Lindholm would be tough to get, but worth asking about, but likely a big no there, unless you added someone very good. Leaving Fowler and Vatanen as potentially the easiest options.
To Anaheim: They have things that we might want, do we have things they might want? They probably would like some skill to try and ignite the offense. I'd try pushing Draisaitl for Lindholm here personally. Pretty fair value, helps both teams. Other options, perhaps... actually, that's the only trade I really see between these squads. We can't afford to trade much else IMO. Maybe Drai for Fowler + or Slepyshev + for Vatanen as options.
From New Jersey:Larsson would cost RNH or Hall I'd imagine - not interested. Greene is their captain, don't see them moving him. Jon Merril would be of interest.
To New Jersey: Not much we can offer them I don't think with similar value. Maybe, again, Slepyshev +.
From LA: Well, any change to grab Doughty? Probably not. They do have good defensive depth and either of Martinez or Muzzin would be nice upgrades.
To LA: As much as I'd hate to see Hall or Nuge go, I'd offer either of them for Doughty. That said, I don't think there's a chance LA says yes, even with us adding so that won't happen. Unfortunately, I would see only our top forwards being of interest to LA.
In conclusion, I would look to trade Draisaitl for Lindholm and I think that is something that could work for both sides, particularly if Anaheim sees another loss. They need to try and turn things around and sliding Drai to play with some of their big vets up front could be a good fit. As a backup, I'd look at something for Fowler or Vatanen.
If could make that trade happen, defense looks much better:
Sekera-Lindholm
Klefbom-Schultz
Rienhart-Gryba