C605 Middle Ambush
The location of the ambush wasn't located on Six Saints Mountain, since this was the location of Saint Extremity Sect after all. There were many experts amongst them, and also quite a few formations, so no one wanted to be used by Zuo Qingyuv's trump cards to escape at the most crucial time of killing.
Thus, the ambush on them was outside of Six Saints Mountain, inside a small valley