Followers -- what am I missing?

[Mavfin]

Followers, and perhaps summons, should just ignore or be highly resistant to non-targeted damage like Puddles of Death, arcane beams and the like, really, given that I'm sure their AI will never be improved to the point where they know to stay away from them. (This already seems to be the case for some such sources of damage like the fiery grates in the Halls of Agony, but for the most part they just get utterly destroyed by any kind of damaging zone.)

Yeah, something like the WoW pets resistance to AoE would be appropriate in this case.