Onto more pets!
The pets from the Gate to Many Worlds can afford to do more damage. The off-hand is meant for Druid pet builds such as pets Druid build, but Druid is never going to be a worldbreaker in terms of damage compared to a Conjurer pet build.
You’re going to use this as either a full Elemental with Arcanist or converting Elemental to something else, which is limited to either Vitality, Aether, or Cold posted in [this thread] at this point. Vitality appears to be the most “breakable,” but that can be handled by giving a slight nerf to Skeletons or the Lost Souls set. Aether pets are a very niche case, and Cold pets are what I’m working on and break the Beastcaller’s set so you can’t abuse it with double Briarthorns.
In these sorts of builds, GoMW is some of the only AoE damage available for pet builds, and with the damage it does now, these sorts of pet builds suffer, especially in Crucible where pets dying removes their buffs (whatever is said about the buffs applying to pets as well as the player, the difference in pet survivability between having the buffs and not having the buffs is immense).
The last time I completed Crucible for Cold non-set pet Conjurer with Gate of Many Worlds? 10:30. I know it’s me playing Crucible, but I already can do 6:30 with non-pet builds. I doubt anyone is going to find a sub-5 Crucible build if you buff this off-hand.