Dirk Nowitzki has the most career points per game + assists per game * 2 / turnovers per game * 2 when playing 30.0+ minutes per game and winning 1+ championship, with 7.79.

highest all-time (ppg + apg *2) / (tpg *2), 30+ mpg, 1+ championship
Interpreted as:
highest all-time (ppg + apg *2) / (tpg *2) by a player, 30+ mpg, 1+ championship

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