My guess is they'll start out with Brown on Mitchell, and Tatum on Okoro. That way Tatum can just play way off okoro and provide some supplemental rim protection. Then they'll have White chasing Strus around screens.
I'll be at the game (in the nosebleeds), so hoping this is a fun game that they win by 10+ so its not too stressful. I went to game #1 of the Phili series lats year and it was not fun watching harden drop them without Embiid.