Think in terms of builds I'd say #1 popular is wander then #2 is going to be holy relic.  Holy relic is incredibly solid and the 20% cooldown for early level helps meet the 3rd CD requirement easily.  The big streamers won't really talk about it because it's "minions", but that build is 100% going to be hugely played and rightly so.  The changes to Command of the Pit also makes it so you don't need to be a Necro, but Necro still probably most comfy.
I really wanted to do BF/BB Chieftain, but managing dex early and casting as a marauder is dogshit.  That and the playstyle can be a bit slow without good bladefall of trarthus volley speed and cast time.  I'm just going to be the only guy playing Skeleton Mages again because the I haven't played it since the AG QoL and the new specter resummoning stuff should be really nice too.