Li kuangge used to be the general of the 2nd Legion. Although his commanding skills were far inferior to Zhao Hai's, he had experience in commanding. That was why he became the commander of the front line and commanded the Army of the freedom Alliance against the nine sects.
However, it was obvious that the main executors of the battle weren't him, but the longevity stage experts. If the longevity undead creatures didn't kill the longevity stage experts of the nine great sects, it would be hard to say what the situation at the front line would be like.