Miami Bron was his physical peak and when he began the mental shift he needed all along, but he peaked in 2nd run with Cavs.
I think when guys got hurt during the 2015 run his brain started to change and he fully clicked on how to just totally dominate a series consistently
Miami Bron put up 25/11/7 and 28/8/4 on the Spurs, but Cavs Bron put up 36/13/9 on the Warriors in 2015, in 2016 he put up 36/12/10/3/3 on 51/42/73 splits with less than 3topg
2017 he put up 34/12/10 on 56%FG 39%3PT
and in 2018 he put up 34/9/10 again with a Game 1 of 51/8/8 on 60%FG, 43%3PT, 91%FT - maybe the GOAT Finals game
Miami Bron would never do something like that