Warlocks: When to 'pop' your "Self-Rez"

[Shimus]

I like to keep it in times of need, like as the failure screen is counting down.. 5....4...3...2...1....self-rez, thought we wiped didn't you?

Then I play this music:

https://www.youtube.com/watch?v=sTSA_sWGM44

And I laugh. And all is well, and I rez everyone else and complete our task. Unless it's a Hard Mode Raid, in which case I just dance and play the song I listed again.

So, how about you? How often and necessarily needed do you "Self-Rez"? (Fireborn)