Contain Adebayo and the Celtics can control the boards. As Kanter showed in game 2, besides Adebayo, the Heat lack size inside.
So I advocate Robert Williams to start and make life a bit more difficult for Adebayo and then you bring in Theis and Kanter to punish them inside. Let Kanter do his work in the paint and give him help with rim protection by playing Theis next to him.
Like Kanter/Adams was a great duo in Oklahoma, I think Kanter/Theis can be as well. Kanter has that talent and size in the post, while Theis can be the intelligent help. Sorry Kelly Olynyk: but good luck to you handling that.
Minutes distribution something like this:
Robert Williams 25
Hayward 20 (if Gordon isn't ready, then give some of these minutes to Grant Williams, in any case: no Ojeleye)