Karate Kick is a strategy best used by the Monsters.
As the Monsters, armor up to prepare for battle, then locate some Nomads. Nomads don't seem like much of a threat until you intrude on their territory then they will charge and kick the Hunters dealing heavy damage. Scare some bird in the area to trick the Hunters into using the Mobile Arena with one or two Nomads and they won't know what hit them! Hunters will often be so focused on the Monster that the Nomads may even incapacitate them for you!