I would say paying that whalloping 12 points for Hannah is not really worth it when usually just Lilith + Primordial magic already lets you draw 8 cards and keep 6, which is good enough to ensure a decent hand without sinking too many points into it.
Now, one issue you might find is: Nekima is really, really powerful. She will get bogged down, focused, rushed and whatever the hell else your oponent can do to keep her from mulching their stuff, which she will if she has the chance. I often run models like the Black Blood Shaman and Mister Graves with Nekima, as supports for her.
The shaman can heal and add some ping damage if you are surrounded or fail to kill an enemy by only just. And Graves can potentially allow for silly yet awesome first turn charges (Dangerous, but might work if you do it at the tail end of the turn and then get initiative next.)
What I am saying is: when you take Nekima you end up building your list more around her than Lilith, which might be cool, but is something to keep in mind.