
Luckily Gamorreans are very slow, and you can easily get out of the way. One slice can even mortally wound a hero.
The Gamorrean Axe is large and sharp, and along with a Gamorrean Guard's great strength, can inflict maximal damage. It is not advised to even attempt to kill multiple Gamorreans at once, even as a hero. Though they run slowly, they can still jump surprisingly far, which can be a death sentence up close. Never underestimate a Gamorrean's speed.
Last but definitely not least, DON'T let them get close! Take advantage of the fact that you usually can run faster than Gamorreans, and keep yourself at a safe distance from their 1-hit K/O axes. Using a Jedi with Sprint, lead a Gamorrean to an enemy Command Post, to assist in its capture. Mines and time bombs are also good if placed near your Command Post. Alternatively use a sniper and stand well back form the Gamorrean, two headshots should do it. (Note: You can only survive a Gamorrean Axe's hit if you have the guardian award, if you don't have the award it's impossible to survive) Use a Rocket trooper, or Jedi, they are the only units to be able to kill a Gamorrean in one hit, with enough health to survive a hit from the Gamorrean's axe.