Oilers goaltending is pretty terrible compared to Vegas and Vancouver.
The Oilers' team save-percentage is notably higher than Vegas's so far this season (I realize Vegas didn't have a back-up for a long time, but Fleury's .906 is the same as Koskinen and Smith's). It's a little below Vancouver's, but now that Markstrom is down, I'd say the Canucks' goaltending is facing challenges. The Oilers actually have two League-average starting goaltenders, which I don't think is the case of any other Pacific team.
The Oilers aren't playing very well at the moment, but with a rash of injuries hitting them in the last few weeks and being in the midst of a bunch of road games, that's sort of understandable. With blowing an easy point to get yesterday vs. Anaheim, and being bushed and AWOL in today's Vegas game, they now have 2 regulation wins in the past 7 games. At this point, I doubt they're finishing top-3 in the Pacific, but does it matter? They're likely making the playoffs in a Wild-Card position.
Assuming they make it at
any seed position, and if all of Klefbom, Yamamoto, Neal, Russell, and Nygard are all back and in shape to start the playoffs, I do think the Oilers have the best forward depth in the Pacific by some distance. Maybe the best in the western conference. We're talking about the #1 and #2 scorers in the League, RNH (a first-overall who has been heating up lately), Yamamoto (PPG since he was called up and thoroughly impressive), James Neal, Athanasiou, Kassian, etc. They're actually quite stacked now, up front.
They also have the best power-play in the League, and one of the better penalty-kills. They're probably the best team in the NHL just on special teams.
Where the Oilers are less impressive -- but not below average, either -- are in defensive depth and in goal. This season has partly been made by the emergence of Ethan Bear, a total revelation on defence. Klefbom remains a good puck-mover, and this season has mastered the PP-art of moving the puck to the big-two (he still can't hit the net to save his life, however). Nurse continues to both impress and frustrate -- has an amazing toolbox, but no hockey IQ. Russell is okay. Larsson is somewhat resurgent lately, and has been playing his best hockey since 2017. Jones has potential but isn't there yet, and the jury is still out on Lagesson, who likely won't survive the injured guys returning. The addition of Mike Green seems fine so far, but mostly just a depth-addition move. Both Mike Smith and Mikko Koskinen have had mostly-good-but-occasionally-crap seasons. Personally, I find Koskinen steadier and more consistent, but Smith can steal a game here and there. The team seems to play with more urgency with Smith in net, I've noticed, for whatever reason. Coach Tippett knows Smith from way back and seems to prefer him.
Anyway, if everybody is healthy, there is no reason the Oilers' chances of winning the Pacific are less than anyone else's. I personally do not think Vegas is better than Edmonton (despite recent results).
Besides average D and goaltending, the Oilers' main issue I think is readiness and consistency. They often aren't ready to go at the start of games, or they seem weirdly satisfied with beating a great team and then pull a no-show when they face a lesser team. It's rather frustrating.