It would be situation, but in that amount of time you can easily get back to full.

However Living Dead has never worked for me. Not that its bugged, but that I can never get back because the healer isn't able to, or is already dead. As it is right now, Living Dead is sadly more of a "How can I best leave my party" state. I've used it to set up the aoe blind, to stun and get Salted Earth and Scourge on everything I can, or to hold the ground and tell the dps (friends at this instance) to run back to the healer. Oh, or at the end of a fight because I'm trying to hold the boss for the DPS for those precious ten seconds (mostly level 50 EX fights)

One day it'll be in a better state =;[