Talk:Nightmare Mode/@comment-142.136.12.109-20130818033605/@comment-8610408-20130822070148

What Polytop said. When I did my first (and only) Energy Drain NM mission, I thought it was some kind of bad joke. I run all of my frames as casters, so the name of the game became "artful dodger." Seriously. You would run around the field getting ammo and other pickups while avoiding the energy orbs, only grabbing them when you needed, and keeping your finger positioned above the 3 or 4 key so that you could hit it as soon as you reached 75 or 100. Royal pain. Out of all of the NM modes, Energy Drain is the most Nightmarish, imho.

To answer your question, no, Energy Siphon is as useless on Energy Drain mode as Rejuvenation is on Vampire mode. Better to just load up one of the second string Auras like Rifle Amp, Shield Disruption, or even Enemy Radar just in case, since NM is specifically made to render the two best Auras to simple "frame-point buffers."