You need to use the feats of a) weapon finesse, b) weapon focus (rapier) and c) fencing grace. Starts becoming a viable melee character at lvl5. Before that, you can just forfeit her damage as it will never be good for a combat character.
So at this moment, it is just valid to spam “slumber” as does ember.
They could have easily fix it by making her human, then you can get fencing grace at level 3, or simply trying to come up with a character more viable “mechanically”.
But … why the heck is she a shaman? I mean what part of the story makes thinking “oh yeah she fits a shaman” - which by the way does not fit at all her background. I mean she can be a rogue an oracle a sorcerer a magus … but shaman??? does not fit at all!
And she will also make your rogue less shinny due to her high "trickery skill.