I might have an idea for her. How about if we add to her a bombard like shadow witch but at the place of damages and knockback we make it paralyses?
Also at the place of the heal (or she can keeps it if needed) she could have a deployable area of effect that could potentially give a buff. Any buff could do : Defense, offense, healing buff, or even an ensnaring effect.
We also could give her high range for exemple, 40-50m.
Those are only ideas, but if you want to inspire from those, just go ahead. ^^