This is an unnecessarily tanky [Nekros], meant for running the new steel path Lua missions (Conjunction Survival).

This build only needs one terrify cast to completely strip armor from enemies.

Arcane Reaper is a matter of personal preference. It provides nice healing in a pinch. Use something else if you don't need it.

Shield of Shadows is there to avoid getting owned by acolytes (outdated, see below).

This build is meant to go together with 4-5 blue archon crystals attuned to armor. You can have one yellow attuned to cast speed if Shadows of the Dead cast time bothers you. The reason this needs so much armor is for putting armor link on your pet. With this much armor and health you won't have to worry about resurrecting your companion ever.

I replaced the first ability with Golden Instinct because this build is meant for farming. Use whatever you want.

UPDATE 38.5:

This build was made before the changes to shield gating. Replaced [Vitality] with [Primed Redirection], [Streamline] with [Amar's Hatred] and [Power Drift] with [Primed Sure Footed]. Power creeping made [Shield Of Shadows] useless if you can one shot acolytes, use anything you want on that slot. This build is compatible with [Secura Lecta] credit farming by the way, just put [Khora]'s Ensnare on his first ability and replace [Corrosive Projection] with anything else