I rank Luka Doncic among the five best players in the NBA. The guy is like a modern day version of Oscar Robertson, who yes I did see back in the day. A triple-double machine. But while Doncic is elite, the Mavericks aren't. 
Dallas is a .500 team with the record to prove that - 16-16. So I don't see the Mavericks getting away with laying this many road points in a flat spot for them. 
The Mavericks are coming off an impressive 115-98 Saturday road victory against the Nets, which snapped Brooklyn's eight-game win streak. Dallas' last three games have been against the Celtics, 76ers and Nets. This is the conclusion of its three-game road trip. So I don't see the Mavericks producing another "A" game given the circumstances and motivational letdown facing a much weaker opponent than they've recently met. 
Historically, Dallas hasn't been good in this role going 5-16 ATS the last 21 times when facing a below .500 opponent. 
Let's examine the Magic's past six games. They beat improved Knicks and Warriors teams along with the Pistons. But in their last three games, they lost a rematch to the Pistons and were buried by the Nets and Jazz. No shame in losing to Brooklyn and Utah. Orlando was outclassed in those matchups. The Magic won't be so outclassed here and they are in stop-the-pain mode. 
Orlando actually gives up fewer points per game than Dallas. It's lack of scoring that really hurts the Magic. The combination of having Evan Fournier back - he missed the first meeting between the two teams that Dallas won, 112-98, on Jan. 9 - and the Mavericks' 22nd-ranked defense should help Orlando put up a respectable scoring number to keep this game close.