Edgewater

They are, and I don't blame you for some possible skepticism. I took some screenshots to demonstrate, and here's one of them. You can see that it will kill a paladin, cipher, and mage. Based on hp/level, that will also extend to every class but (I think) barbarian and hunter. If I gave her another healing buff, it would make it worse.

So far I'm not hearing anything to convince me that using this ability makes sense. I'm hearing some (admittedly pretty clever) edge cases. It's really a pity, because I want to love the Paladin, but no reliable rez on Path of the Damned is a serious disadvantage. The priest, druid, and chanter all have a rez that doesn't then guarantee a KO and second injury 15 seconds later. Wishing I had paid more attention before choosing Pally for Pallegina (But it's right in her NAME!).

I have built Pallegina as a pure paladin, and took Reviving Exhortation as soon as it was available. I'm playing Path of the Damned and a rez sounded great. But it seems to be almost entirely useless. My party is roughly level 12. When the buff fades, it deals 180 damage, which is equal to or greater than the health of my cipher, priest, druid and mage, as well as my chanter and other paladin, who are about a level or so below Pallegina. How is it supposed to be used? You can't remove the debuff, and you can't outheal it since it instantly kill the characters even if they are at 100% health.