A Gloomy [Nekros] build, not that much original.

Gloom is a fantastic choice for [Nekros] since it can easy [Recover] energy.

First of all, [Nekros] has fantastic augments and have a incredible sinergy with health and energy orbs mods, so half of the mods are already compromized: [Despoil] for easy maintenance of desecrate; [Shield Of Shadows] for more tanking capabilities; [Health Conversion] for the extra armor (since desecrate can give a infinite supply of health orbs you will have at least 450 max health bonus for almost entire time); [Energy Conversion] for extra 50% strength (again, energy orbs will appear a lot with desecrate); and [Equilibrium] for never running out of health or energy.

Now for the rest of the build.

Duration for [Nekros] is fantastic for maintaining the shadow army which triggers [Shield Of Shadows] damage reduction, so at least [Primed Continuity] is a must have.

Efficiency is neglegeable, you will have a infinity supply of energy orbs, knowing that you could switch [Augur Message] for [Blind Rage] for more strength, i dont think its necessary since the strength boost mods and arcane will be enough for 100% armor strip terrify, but personal choice.

Range is very important, boost desecrate, terrify and gloom by a lot, so keep at least [Stretch], i dont think overextend will be necessary or usefull, since take our glorious power strength.

Strength is also very important and i dont initially put in the build... what is my problem???? [Growing Power] + [Energy Conversion] build with a 100% base strength is almost enough for 100% armor striping, for completing the 100% just kill a bunch of enemies and let the molt augmented do the job.

The eximus mod slot, the aura mod and the [Augur Message] slot are for personal preferences, switching then will not affect the build so much... keep an eye for the aura tho, since you will need more molt augmented charges for full armor strip.

The arcane slots are reserved for molt augmented for more power strength and the second one is dealers choice, choose whattever suits your playstyle, i choose molt efficiency for more duration, but it could be switched by arcane energize or arcane blessing, your choice.

The playstyle:
1) As soon you gatter energy use desecrate and gloom, duh.
2) Cast Shadows of the Dead as soon as you got a energy orb for maximum damage reduction and crowd control, with some molt augment charges you will get the maximum 90% damage reduction ASAP.
3) Cast terrify for more crowd control and armor striping.

The arcont shards... Give preference for casting speed and energy orbs efficiency (unless you picked arcane energize), if have any free slot give duration or strength a try.

PLAY WELL TENNO.