Is 4 the magic number? Do we want to win the next four games while the Cavs lose the next four so we clinch the 1 seed?
Personally I'd just rest the starters and lock up the 2-seed. Doesn't matter who has home court in the ECF or NBA Finals, I prefer this team start off on the road and get them motivated.
The Celtics will not rest everyone for the entire final week with another week off to follow during the play-in games. Look for something like the following:
Tuesday vs. NY: Playoff rotation.
Wednesday vs. Orlando: Horford, KP, and Jrue all rest. Starters might not play the fourth.
Friday vs. Charlotte: Playoff rotation for first half. Maybe starters come back out for third quarter, but they do not finish the third.
Sunday vs. Charlotte: Everyone sits.
Cleveland is going to win on Tuesday anyway, so there is no reason to think of seeding. It is all about finding that balance between rest and rhythm heading to the playoffs.