I don't even have Barnes listed. My chart was for optimal results. Of course, nothing ever works as planned, and that is where Barnes could eat an inning here or there, of we could use ERod (or Eovaldi if ERod starts game 4) for 2-3 innings. Something like this...
Game 1: Sale 6, Wright 2-3, Kimbrel 0-1
Game 2: Price 6, ERod 2-3 (Brasier/Barnes 1), Kimbrel 1
Day Off
Game 3: Porcello 6, Barnes 1, Brasier 1, Kimbrel 1
Game 4: Eovaldi 5, Wright 3-4, Kimbrel 0-1
Game Off
Game 5: Sale 6, ERod 2-3, Barnes/Brasier 1, Kimbrel 1
This covers more bad contingencies.
On longer IP by our starters in the ALDS, I look at it this way, Cora has pulled our starters early during the regular season, because he wanted to keep them fresh and healthy. Once you reach the playoffs, the "long strategy" pretty much goes out the window. Plus, we will have 5 days off before our first playoff game. Everybody will be on extended rest mode by game 1 or 2 and even game 3 and 4 for our SP'ers.
I'm hopeful we can get 7 IP much more than the 6 out of 19 rate you cited.