No Roar/Eclipse, no Warframe's Arcanes, just pure [Felarx] dmg with 3rd [Ivara] buff.
For 1st Evolution: Incarnon Form
For 2nd Evolution: Frictionless Flight (+50% Projectile speed)
For 3rd Evolution: Mounting Momentum (+10% fire rate for each shell reloaded) or Dual-Mode Chamber (+100% Projectile speed and 4m Punchthrogh while Reload toggle weapon) in the video.
For 4th Evolution: Racking Wrath (+20% Status chance -10% Critical chance)
For 5th Evolution: Devastating Attrition (+50% chance for 2000% damage on non-crit)
For Ivara_Prime Build: bult your strength over 250% for 2.0x Headshot damage while invinsible.
TIP: In order for her to stay still in her animation: Transfer to Operator and void sling before trigger the cinematic (Works everytime).
[Ivara] with full arcanes and stacks: