I hear a can of Wasp spray make a great weapon.
With 2% capsaicin, anything coming at you is going to stop in its tracks. It will "induce an almost immediate but temporary burning sensation of the skin and a burning, tearing, and swelling of the eyes. If OC is inhaled, the respiratory tract becomes inflamed resulting in swelling of the mucous membranes lining the breathing passage and temporarily restricting breathing to short, shallow breaths."