If you use Hellfire (Ignites the area surrounding the caster, causing 306 Fire damage to himself and 306 Fire damage to all nearby enemies every 1 sec. Lasts 15 sec.) just before you are about to die you won't get any armor damage. Very useful in a wipe.
I know it is common sense but I've met a lot of locks who had no idea about this.
I first accidentally made this post in the exploits part so I deleted it.
If it is a repost sorry but i searched before posting.