Game 1 Celtics: 27 assists on 39 makes. Tatum and Brown took 30 of the Celtics' 82 shots (37%), shooting 13 of 30 overall and 4 of 13 from three. Porzingis, White, and Holiday took 31 shots, hitting 15 (10 of 20 from three). The bench guys took 21 shots, hitting 11 (8 of 16 from three).
Game 2 Celtics: 21 assists on 37 makes. Tatum and Brown took 43 of the Celtics' 80 shots (54%), shooting 23 of 43 overall and 6 of 15 from three. Porzingis, White, and Holiday took 29 shots, hitting 10 (3 of 12 from three). The bench guys took 8 shots, hitting 4 (3 of 5 from three). Pritchard did not have an attempt.
I think if you are playing the Celtics, you want Tatum and Brown to take it on themselves to do the scoring. And given the right incentives, they are ready, willing, and eager to oblige. They are, first and foremost, slow-it-down isolation players, and that is what they default to under duress.