They either are invincible for 5 maps in a row or just die 80 times to floor damage left by monsters.
:furious::furious:
I was pretty peeved about the area damage deaths myself, but then I remembered that I made the choice to stack pet damage, not resists.
They are immune to permanent floor damage, thankfully, but I started having better results when I added some resists (mostly acid) to my pets. If you’re a Cabalist, pump up Aspect of the Guardian a bit. Also, be sure to get weapon and shield components that buff aether and chaos resists, as well as augments that do the same for your pets.
On top of all that, use your Pet Attack skill to move your pets out of floor death by clicking it on empty space to move them.