Personally, I'd like only like a single simple tweak on Mind Control to be considered baseline for her kit. Apart from maybe a slight range increase on her absorb, or number of bolts fired by psychic bolts to scale with strength.
Mind Control - After the invulnerable conversion phase, Nyx gains a % of the target's base defenses whilst they are mind controlled. With the % multiplied by power strength and again by the final damage multiplier.
Subsumed Mind Control - reduced % of the above.
This encourages active gameplay to ensure you can get the best out of it - selecting light u