This is a big totals number. Perhaps, on the surface, it may be justified. But a lot has to go right for the Over to cash. I believe the marketplace, whose early money has been on the Over, is wrong to bet this one up. 
James Harden, Kevin Durant and Kyrie Irving are learning to play together. Harden and Irving are still rounding into shape. There were just 183 points scored in the Nets' last game, a 98-85 win against the Heat two days ago. The Heat did have numerous people out, including Jimmy Butler. Still, holding any NBA team to 85 points is impressive. 

There were 207 points produced in the Hawks' last game, a 108-99 Atlanta victory against the Clippers last night. LA was minus Kawhi Leonard and Paul George. The Hawks, though, have been in excellent defensive form recently thanks to big men Clint Capela and John Collins. If you discount a 129-115 loss to the Bucks, the Hawks have held their last four opponents to an average of 100 points. 
Atlanta ranks No. 2 in defensive field goal percentage - so Harden could be in for a rough shooting night - and has the third-best defensive field goal percentage in the league.