I found a way to bug all the creatures in sher car! ...... what you've gotta do is: (1) get near an invisible wall, and get to a corner..
(2) get out a gun
(3) shoot the little creatures fron an angle, on the wall, making them run into the imaginary wall.
(4) after killing the little scorpions, get on the left of Sher Kar
(5) find another imaginary wall... plus its corner counterpart
(6) shoot Sher Kar from angle, forcing her onto the imaginary wall... disabling her ability to attack you
Great way to solo Sk....