Octavia is very strong, insanely strong. But also so very annoying (and sometimes boring) to play. Throw down the mallet and amp, press 3, spam crouch, throw something onto 2nd monitor and just spam crouch and refresh the abilities every now and then.
Though I have to thank her for being able to carry me through an otherwise awful EDA rotation.
Just spam crouch and you'll stealth. The other ones are just nice bonuses if they show up, but stealth is the important one.