214% ability strength is the bare minimum to max out SoS damage mitigation at 90%.

With one-from-the-top [Blind Rage], the energy cost of Shadows 150, the max energy capacity of [Nekros]. Since Shadows now require max energy, any energy drain will make it impossible to cast shadows. To fix that, I put in [Endurance Drift]. The extra energy capacity will give a little bit of leeway, enough to cast Shadows through an energy drain eximus.

If the extra range isn't needed (if you're playing solo or with a coordinated squad), I'd highly recommend replacing [Stretch] with [Natural Talent] as the base casting speed for Shadows of the Dead is painfully slow.