At least Kith took one out before her demise.
She'll just try to take that other one on with her two trusty daggars, as running would probably kill her anyway.
If she survives that, she'll amble toward the rest of the battle, likely to backup Aranwen, who looks the most messed up, by way of Cedric, in hopes that he has one more heal spell left for her, but if not, it is what it is. If Ch'dau ends up looking to be in a rougher place than Aranwen or anyone else, she'll go back him up.
She'll focus on assisting with the gigglers on her companions first, as they seem to be the most horrific and hardy.
IF possible, after figuring out if Cedric is able to heal her or not, and assuming she's made it that far, Kith will try to be sneaky and get a sneak attack in. If it seems like trying to be sneaky will take too long, she'll just charge in, daggers blazing, like the mad, dead woman she's about to be and angrily stab as many zombie heads as possible.
C'est la vie.