What Suns need is a good ball movement, their defense is just alright but if they can't move the ball well, they'll have a problem with their offense.
Look at game 4, Booker did everything to win but they still fall short because they were not getting good contribution from his teammates.
If Suns will get at least double-digit scores from Bridges, Paul, and Crowder, I think they'll increase their chance.
Just like how Bucks lose their 2 early games, Giannis is doing everything but his teammates didn't jive well and produce good numbers for the team, Booker tried to carry Suns in game 4 but like what you observed there's none from his teammates to back him up.
This coming game 5, Suns needs to bring back the teamworks that send them to this finals, they need to work together to win the game.
Double digits from their first line and also let Ayton to contribute not only for his rebounds but also with his offense.