They've got to experiment and find something that works.
Everything they've tried in this series hasn't managed to bring consistent results. Despite TheColi spamming the discussion about the starters* playing the entire 2nd half last game, when they've rested the starters in the 4th in previous games, that didn't work either. Every single thing they've tried in every 4th quarter of this series hasn't seemed to work.
I mean, regardless if playing Kleber works or not, they've got to keep trying different things. They've got no choice.
They keep doing what they've been doing, and they won't win this series.