I have a feeling that the western conference ranked 4, 5, 6, and 7 might be more difficult to beat during the playoffs. These teams are not just capable but they are well-experienced teams with playoffs veterans that can remain composed during the toughest games and clutch times.
I did a quick look on the official website on the 4th-7th seeded team right now. If the regular season ends up today, the teams who are in the 4th-7th are the Suns, Clippers, Warriors, Lakers. Base on their current roster, I will say that they are hard to defeat on the playoffs, and those teams who will face them will be having a hard time defeating them (of course this disregards injuries).
Phoenix Suns - They have 4 all-stars plus Okogie is playing very well in their last games. The only problem with them is their bench which isn't that deep IMO.
LA Clippers - PG13 getting injured really is a big hit for the team, and I don't know when he will return, but if he will return on the playoffs, their opponent will be having a hard time defending them.
Golden State Warriors - Let's not forget that they are the defending champions. They might be having a hard time winning on the road, but when they got the rhythm, and get those wins on the road, they're very deadly. Remember that they also got GPII back. Kuminga is also improving both on defense and offense. Wiggins isn't playing as well.
LA Lakers - Ever since the trade deadline, the Lakers are 2nd in defensive rating, and with a healthy AD, the Lakers really is a hard team to defeat with. They also have a good depth as well.
Poor Dallas Mavericks, I want them at least inside the top 10. This might be the most stacked year in the west. Although I did notice since I was a kid that the western conference is always with better win-loss teams than the east.
The frustration of Luka towards the call of the referees definitely affects his performance. Add also the fact that they are one of the worst defensive teams right now. Their highest place that they can get at this moment is at least the play-in tournament. Good luck with them, and I hope they will get better players in the off-season.