Honestly, i don't know why Nyx is underestimated. I think she is one of the best. Original Nyx has a problem with armor but the prime version has 65, wich is a bit low but enough. In general, her stats are okay, but abilities. Oh my, the abilities is where she shines:
: Damn that mind control is good. It has so much utility. Grab dat eximus for dem buffs, take that shield ospray for those frikkin' shields, kinda isolate certain enemies from the fight. Also, you can take that augment for increase of damage of you slave.
: Well, that's a meh skill. The only use of it i found is low level missions as it's the only real damaging ability you have. Slash procs are good (especially headshot ones). Taking augment makes it a bit more useful but would you when you have you all swag chaos?
: Oh boy, oh boy, oh boy. This skill. This damn skill. Imo, that's the best ability in the game.
Not very effective at start but, God, how it shines later. Stun + (kinda)mind control + huge aoe and all this package for only 75 energy? That's a deal, give me two plz.
Summary: So awesome i came
: Someone can think that it's mediocre ult. I will say that it is versatile
It helps you to protect someone when they revive an ally, you can be instead of a frosts snowglobe, as energy costs of absorb is sooooo low. You can use it to go afk, you can use it when yo need to write something in chat. Run out of shields? Press dat ult and regen those bastards for ages
In my opinion nyx is a good control frame with her chaos. Also, good enough for solo.