Those quests are at odds at present.
"Unfortunately, we're in the position where these are important games, so we really can't adjust too much," Roenicke said. "You can't mess with the rotation too much, so it's going to get interesting."
Entering Monday, the Brewers were one game ahead of Arizona for home-field advantage in the division series, after beating Florida 9-5 Sunday. If the teams finish with the same record, the Diamondbacks have the tie-breaker by winning the season series, 4-3.
Atlanta is still clinging to the wild-card lead in the NL. If the Braves hold on, they would open at Milwaukee or Arizona, whichever is the No. 2 seed. The other team would go Philadelphia to open the playoffs and face Roy Halladay and Cole Hamels in Games 1 and 2.
Right-hander Yovani Gallardo is slated to pitch the final game of the season Wednesday against Pittsburgh. If he makes that start, he wouldn't have enough rest to pitch either Game 1 or 2 of the division series.
"We're trying to figure out with 'Yo' whether to keep him on that day or just wait," said Roenicke. "There's a lot we need to work out, I think the last two games especially."
If the Brewers need to win that last game to clinch home-field advantage and avoid opening in Philly, Roenicke said he'd probably pitch either right-hander Zack Greinke or Gallardo, or perhaps both for a few innings.
"We'll go day-by-day but we have a plan for what the options are," said Roenicke. "We know when we get to a certain spot what they are."
Roenicke also said he would go with a four-man rotation, which would include Greinke, Gallardo, Randy Wolf and Shaun Marcum, in some order. Lefty Chris Narveson will go to the bullpen for the postseason.
Asked how vital he considered home-field advantage, Roenicke said, "I think it's important, no doubt. I think in a five-game series, probably more important."