I still say, water balloons are the most effective medium range nuisance you can deploy. Soakers short range. Long range would be a fire hose.
Bring electric blowers backed up by gas. Electric starts immediately gas takes a few strokes but are much more powerful. Repel their gas onto them and always have the wind to your back.
Just water, it's safe, effective, and when your out in the cold even the best navy seal would quit after a duration. Learn Kung Fu