When Leon noticed that he would have to face the four remaining enemies generals, he did the only thing he could do, run. Facing two of them at the time was suicide, fighting against four was asking to be tortured to death. That was even truer considering that Leon killed two of their friends.
"Now what?"
Even if Leon uses his spears and the plasma inside of them, it wouldn't be enough to kill the angels. He would only succeed if, by some miracle, he destroys the eyes of all of them, and like always, Leon didn't want to rely on luck.
"I have to get Soul Eater..."