Turning DRK into a tank was a huge mistake.

[RedAntares]

I had a dark knight not using living dead when every1 on the party was K.O. and boss had only 1%HP left <.,<

Maybe he used the skill before the party wiped and it was on CD? It happened to me before where I would pop my Living Death when I though I would die but didn't and later I would need to use it but can't beacuse it's on cooldown, the thing about that skill is that it's not even instant cast, it has a delay of like 1 sec, so you can't cast it just when you are about to die, you kinda have to predict in advance if the boss is going to kill you or not, which sometimes makes you waste the skill.

As for DRKs using STR stuff, I don't know how they survive dungeons like that, I use all VIT gear and sometimes feel kinda squishy. D: