Quote Originally Posted by Selli View Post
They always have. Pets would be pretty OP if you didn't have to keep your eye on them and the Sustain spell would be pretty useless.
Sustain is useless. I think I've used this ability on average twice per week for the last 3 months, and that's only because I'm lazy. I'd gone an entire year without using it.

As for the OP: Some ground attacks act as DOTS, such as the poison in CT and the Shadow Flare skill, pets are not immune to these, they are more like environmental rather than ground aoe. Ground aoe are attacks that hit once, when they explode usually like the noxious gas from T11, and the ground plumes in Ifrit Extreme, these deal pet damage.