Update for the current Playtest build. (Note that this is based on my experiences with my own builds)
First things first, Zantai essentially wrote a love letter to pet builds atm.
Now, Beastcaller, Trinkets, Diviner are all performing similarly for me.
Ghol Blightfiends feel like they took a heavy nerf (based on kill time vs callagadra)
Lost Soul Skeleton Cabalist has went on to become my best pet build atm with 1:50 min callagadra kill and around 5:20 min naked Crucible with extra spawn (both using mogdrogen’s elixir however)