The mavericks after acquiring PJ and Gafford went 21-9. Two of the losses came when most of their starting rotation was rested since they secured playoff position. Source

Mavericks also had a lot of injuries, LEBRON WAR (Wins against Replacement) estimates 7 approximate missed wins due to injury. Source. OKC, Denver, Timberwolves, were one of the most healthiest teams in the league comparatively. Their WAR numbers are 2.51,2.7, 3.12.

There were 3 additional additions to this team recently, Klay who replaces THJ. THJ shot 36% from three and was abhorrent the 2nd half of the season. He was also one of the leagues worst defenders.

Naji replaces DJJ,Naji is a great defender and shot 38.7% from three last season excellent shot form. DJJ shot 35% mostly wide open with horrible form.

Quentin grimes replaces Josh green, grimes in New York was sought after great defender has an excellent three pointer is more polished than Josh green and better overall.

With all these additions how many wins do the Mavs achieve next season my biased prediction is 60+ maybe even 65.