In both cases, make sure to mod your Warframe for max Duration and Efficiency and also consider using the Flow or Primed Flow mod in order to remain cloaked for as long as possible before you have to use Energy Restore's. Also make sure to equip a silent weapon like a bow to avoid alarming the guards. If you prefer to play Ivara I recommend you equip the Infiltrate augment mod as this will allow you to move slightly faster and also allow you to walk through laser barriers without being detected. With the Hushed Invisibility mod I can even equip my favorite sniper rifle and pick off guards at a safe distance without alarming the other guards with weapon noise. Personally I prefer using Loki as he is able to move around much faster and can sprint and bulletjump while remaining cloaked this allows me to finish the mission much faster than with other stealth warframes. The easy way to unveil this Riven is to use a stealth Warframe to avoid detection, e.g.
