Titania is hard to wound, if nekima is bladerushing she isn't flying so the terrain will slow her.
Nekima is 3/5/6, titania can easily hit that with into the thorns and as it places if there is a hungry land nearby then that's 1 more damage too.
Titania has 14 wounds and nekima cannot hit severe against her. They are pretty much on par but Titania has range and also sets up for rest of crew to punish nekima with the injured.
I have played Titania alot and she can deal out the hurt as well as nekima without having to go in close, she's also better protected with hard to wound plus cruel disappointment.
Also the rest of her crew is great IMO, add the emissary and its well rounded.