This one is complicated, I see a couple of wrinkles here.
Beating the Bucks helps you get home court over them in the 2nd round, which will be important in what should be a brutal series.
But playing hard against the Bucks now, showing them your hand, could also help the Bucks game plan better for a playoff series. Ime is from the Pop coaching tree after all. Show the Bucks your hand tonight and get home court, but also allow the Bucks to better game plan and adjust and steal a potential Game 1 in Round 2.
And then there's the play-in games. I'm less worried about the 1st round opponent (but actually think the variability of who you could play makes things interesting, and harder for top teams to position themselves for a particular opponent, which is a positive for keeping the play-in series around). But the play-in games gives the top 1-6 teams a week off. Do you really want to rest guys when you're about to get a week off, or do you want to keep everyone as sharp as possible?
So I think play hard tonight (and Sunday) to keep guys sharp, but don't treat it like a Game 7 (to not show your hand, so don't do things like play Tatum 45 minutes trying to get the win, or reveal your strategy to slow down Giannis). Keep hope alive for #1, and then your week off and get your rest then.