The Mavs have outscored their opponents by over 200 points from the 3 so far in the playoffs. It's really hard to see them doing similar to GS but if they do, they can beat them. GS hasn't looked great IMO but they haven't really had to either, it feels like what the Mavs want to do will play into what GS does well, GS is tough to beat at their own game. I kind of thought similar about PHX though and look how that turned out.
If you have Luka, you have a punchers chance. Some of the things he was doing yesterday were absolutely amazing. He just took turns abusing the Suns lineup at every level of the defense. He even went right at Ayton in the paint and worked him. One of the most unique players I've seen.