I think its a matter of putting pressure on the Astros. Keep them down while hoping to scratch out an early lead. Get the early lead, and now the Astros have to adjust to another pitcher their next time through. The Tiger staff, at current status, is probably best when giving the opposition one look per game.
In addition, get the early lead and avoid Hader in must score situations. Take away Houston's ability to get him into a game while playing from behind. Its an elimination game for Houston now. They'll probably be quick to use whatever tricks they have in their bag now.