Something I usually do also is if there is a guaranteed living dead use (like tank buster in sword oath knights in throdan ex) then I will drop grit while using LD then also as you can't die while in living dead and the healers will be healing to remove the debuff so it's a good time to get some extra mp back or dps in when you can with no risk. Just make sure you have grit back up before the next TB or cleave comes.