Equipped weapon and Dexterity 5 help to withstand the clash with male slaver. With a lack of dexterity, words (charisma) can be used to distract and suddenly shoot him.
Female slaver check uses strength or intelligence, but success is not critical.
Derek? Stats are not checked, just don't show weakness.
You can also hide, but the check is too complicated for my taste (Keensense 7 + Dexterity 6).