It seems now, with tanks having even greater HP pools in comparison to the amount of healing a healer can do on average, that Living Dead sometimes becomes unhealable.

I started to notice this when leveling in duty finder at the start of the expansion. A lot of the time if I used LD and Walking Dead proced, I would just die. Some of the time it was due to healers simply not knowing what it was, but other times a healer would be spamming heals on me and still couldn't meet the healing amount required. It seems particularly hard on Scholar for most of the leveling process since Lustrate is about all they have if Excog/Recitation isn't up, and Astrologian can also struggle too without an Essential Dignity up.

I ran Malikah's Well and Mt. Gulg a few times with a healer friend that I'd consider to be above average-good in terms of skill, they are easily capable of healing wall-to-wall pulls in any content, have experience in savage, etc. If they didn't have their oGCDs available or some sort of burst healing available, it was actually impossible for them to heal enough to keep me alive if I went Walking during a trash pull. On more than one occasion I ended up dying even with them knowing it was going to pop and immediately spamming GCD heals. They needed to at least have some form of oGCD heal available, or multiple even.

This seems to be a bit of a design issue, since tank HP has been pushed to nearly double what it was last expansion, but obviously healing hasn't increased to that level yet. In other MMOs, there were some cases I can remember of mechanics that involved healing to max HP where tanks would intentionally keep their max HP lower than it could be due to issues like these. In FFXIV, though, it is impossible to lower your max HP intentionally without using lower ilvl gear so this is unfeasible.

Hopefully the dev team is foreseeing this issue and thinking of a way to counteract it.

If someone has done the hard math on this, I would be happy for them to post it, to know if this has any consequences down the road at level cap as well.