We all saw how important home court is - starting the series off on a good note, and if things are tight, having that final game at home is huge. Yes, I would absolutely try to win as many games as possible, whether that's 50, 55, 60, 65 or 70.
But if a close late-game situation calls for Gabe Pruitt (i.e., Rondo's having an off shooting night, we're having trouble spreading the floor, opposing PGs are killing whoever our backup point is, Pruitt has played some minutes in the game), I wouldn't hesitate to throw him in there. I hope he gets some more minutes next year because it will save roster space for extra big men to come in and it will mean Pruitt's developed to the point where he warrants minutes.