And what I guess is that drow herself is slave likely (but a slave who has control over Rurik). Plus drow is quite busy being hammered so she may not be even aware attack is happening (so would not Rurik either in his lust frenzy). The spectacle could keep most goblins occupied 1 more round depending do you fireball or narrow focus on goblin shaman (as fireball would aggro entire group that is while one goblin slain or few would not draw lustful goblins attentions away from the show probably).