I've ran into an issue doing higher grifts as a Hota Gbarb running the 2-piece immortal with CoA, mostly with ET wizards with my ancients screwing up the positioning of the rift guardian. I usually port back to town when the guardian spawns while the rest of the team gets it into position. This isn't much of an issue unless the guardian is a teleporter or jumper, the ancients will commonly jump right on the guardian, and the guardian tends to hit the ancients for a while before aggroing someone else and returning to a decent position.
I wish Blizzard would implement a way to dismiss your pets. Another option would be to die before the guardian spawns, or die to the guardian and not pop ancients. Other than not running with ET wizards or other classes that require wall hugging a guardian, could I look to an alternative gbarb build that is just as good as Hota Gbarb? If so what build would you suggest for 80-90 grifts?