For Duan Lingtian, wasting that life-saving celestial talisman on a Nine-Star God of War sent by the Temple of Personnel was acceptable.
After all, the very reason he exposed his identity was to wait for the Temple of War to send people to kill them. He was gambling: as long as the Temple of Personnel didn't send a Nine-Star God of War, but instead sent a group of Eight-Star Gods of War, he would slaughter them all, which could be considered taking the first step to avenge and vent his anger for his master.
Wasting it on Ji Ying, however, was simply not worth it.
Chapter 3555