The marketplace is enamored with the pitching matchup of Zac Gallen versus Zach Wheeler in this opening game of the National League Championship Series. The total is being bet down. 

I don't see it that way. I see at least eight runs being scored. 

The Diamondbacks are averaging six runs per game during their five postseason games. They've faced good pitching, too, drawing Corbin Burnes, Freddy Peralta and Clayton Kershaw during this span. Arizona has scored four or more runs in each playoff game. 

Arizona has displayed a good combination of power and speed. The Diamondbacks finished second in stolen bases during the season. 
The Phillies are averaging 5.7 runs in their last seven games. It's a good sign for them that Trea Turner has gotten hot. The Phillies are a top-eight offensive team. 
As for the starting pitchers, Gallen has pitched much worse on the road this season with a 4.42 ERA compared to a 2.47 home ERA. Wheeler has a 4.13 home ERA compared to a 3.16 road ERA. 

Citizens Bank Park is a noted hitter's park and there are no weather issues.