We never know, but if AD would indeed not available in game 6 then I believe Miami will have an edge and Butler would not be having a problem attacking inside, and Bam as well. But according to this article, Davis would play, so Lakers are still intact.
https://clutchpoints.com/lakers-news-anthony-davis-reveals-update-on-his-game-6-status-for-lakers/The Los Angeles Lakers were given a proper scare in Game 5 on Friday against the Miami Heat, with Anthony Davis appearing to have sustained a significant ankle injury that kept him on the floor for a a couple of minutes.
As it turns out, however, it was nothing but a minor tweak, and according to Davis himself, he should be good to go for Game 6:
Will AD be able to play at his fullest though? Now that Bam is also on the court, someone would have to guard him well too.