I know this is an old thread, but you may like this better if you havent already figured this out:

/micon "Living Dead"
/p Healers! If/When I hit 1 HP, you have 10 seconds to get me to max HP!
/ac "Convalescence" <wait.1>
/ac "Living Dead" <wait.19>
/p If I'm still alive, CONGRATS YOU SAVED MY ASS!!! ... If I'm dead... you fail -_-'

Convalescence IMO is incredibly important to use with this skill