Combat is a very rigorous technical activity.
Although marksmanship is considered a skill, the work Gao Guang does doesn't require much technique. His combat style is all about charging brainlessly—if he can't charge, he'll shoot brainlessly. Therefore, he leaves tasks like setting up machine gun positions or finding suitable spots to plant directional mines to others.
Assuming there are forty enemies, with ten entering the military camp and thirty staying outside on alert and spread out, it's unlikely to wipe them all out in a short time. In such a scenario, a pre-planned strategy is essential.
If all the enemies approach the camp but none enter, or if only one or two come to check the situation while the rest surround the camp, that's a completely different method of combat.
King's Defense, although only a few men strong, must ambush dozens of well-equipped and experienced enemies. The battle is really tough.