DALLAS — Halfway through the second quarter of the Mavericks’ momentous 122-84 Game 4 victory in these NBA Finals, Luka Donu010diu0107 drove past Xavier Tillman Sr., drew Jayson Tatum into the paint and found Dereck Lively II all alone in the right corner. The Mavericks have been in dire need of somebody, anybody, not named Donu010diu0107 or Kyrie Irving to connect from beyond the arc. Outside Dallas’ pair of All-Star creators, the Mavericks entered Friday night’s contest just 9 of 36 from 3-point range. Subtract P.J. Washington’s 4-of-14 series effort, and no other Maverick outside of Josh Green had converted more than two triples against Boston.