Kardia'ing yourself can be the difference between you getting nuked while a dps ganks you and no one bothers to help you so yeah there's definitely a reason for it. I can't count how many times the rest of the party has just ignored that I'm behind our team getting mobbed lol.

Every DoT giving me a shield and dosis giving me heal and phlegma damage could be the difference between me dying or living. The other issue is if your target dies with Kardia kardia just disappears, so often if I see people repeatedly eating dirt I just stop trying to use it on them.

I normally try to hop around with targets since Kardia has no cooldown and be spammed easily, but when like the entire party is running off to go TeamDeathMatch while I'm the only one guarding the crystal, I'm definitely going to kardia myself lol.

To be honest with the new balancing sometimes it's the best play to make to avoid excess damage/stop dying especially if you don't have a tank.