Another idea i had is instead of parrying, she could have feints. Alternatively, instead of a poison her ripost could be a normal swing with the sword (fully charged) and if the ripodte hits she can do a quick second hit with the dagger (also fully charged). Just there for annoyance and because assasin). (We're talking 3-5 health drain, nothing major.
She can parry light weapons, and her repost can be thrust with the dagger, which adds a very small poison effect. The stab does extra damage if hitting the enemy behind. The shortsword would be all of left, right and overgead attacks, dagger used for the stab.
I think the assasin should use a shortsword in her left, and a reverse grip dagger in her right.
