Apart from Smart (because of his ankle) and maybe some injury I don't know about, it doesn't make sense to sit anyone. But managing minutes and experiencing with lineups could be interesting. Like having Jerebko at SF, for instance, or giving minutes to Wallace in case BS figures he might important during the series to defend (make fouls on) Le Bron.
If that costs us both games, all the better - it would give us a chance to face Atlanta. Momentum is important, but losing to Toronto and Milwaukee at full throttle would also undermine what we have accomplished so far. I think not to play as hard as we have in the last few games could be a win/win situation.
I think that's part of the reason Cleveland decided to rest its starters against us and not against Detroit. Imagine if LeBron, Kyrie and Love had lost against us playing 35 minutes each, what would that mean for the series?
This way, the only confidence shattered was of some players who will have minor roles in the series. And even in their case, they will know when they get to the floor will be in very different circumstances than in those two defeats.