Monta Ellis is in a tough spot these days. The Mavericks are waiting on their depth to show up in the backcourt and until Shane Larkin or Devin Harris returns, Ellis is going to run up some big minutes. It’s one of coach Rick Carlisle’s biggest challenges. “He’s so vital to our entire team makeup,” Carlisle said. “We need his playmaking and scoring. I want to try to keep him around 36 minutes if possible.