"Watch that maw, its bite inflicts more than just wounds. Approach with caution!" The Orc probably won't know what caution is even if it hit him square in the face, but maybe the drow are sensible enough.
Taking his own advice to heart, Rith'Arnis keeps his position at the back of the Blue. Prepared to duck and dodge from its possible retaliation as soon as he has connected, he rakes both of his daggers across the creature's back, favoring defense over accuracy.
Fighting defensively, adjusting 5 ft.-step to keep it flanked if necessary.