I don't have any experience healing, and not a lot of experience with DRK. That being said, just hearing what other people are saying about this skill, and reading the tool tip, it seems very situational. It seems like this is an 'oh sh!t!' button that needs to be coordinated with the healer, which is hard to do considering the circumstances an 'oh sh!t!' button would be needed. Alternatively, it makes sense that this skill would need to be used just before a tank buster or something that you know is going to kill the DRK.

It just seems like healing to full health is difficult to do sometimes unless conditions are perfectly planned. 10 seconds isn't a lot of time to react, after all. Maybe this skill made more sense when DRK had that one heal spam skill that people say was lost/taken away in SB.

As a newish player, this skill doesn't make a lot of sense for me to use, ever. The reward does not seem to justify the risk of tank death.