I quit using the 85 1.2 for weddings because the autofocus is so slow.
I actually moved my 85 prime to the 1.8 which much smaller, much much cheaper, and is very fast on autofocus.
Now I will still use the 85 1.2 in the studio as its image quality is extremely good, but my keeper rate for moving targets was dismal.
It might just be me but I need the studio setting to get the razor thin 1.2 to the exact plane.
Good luck