Everyone was talking about the subject, but no real results were coming of the discussions.
Assaulting Saint Fan Shelter pre-emptively would have to be done differently than their attack on Thunder Hell Shelter. Saint Fan Shelter was a mysterious construct, and it was encircled by a moat. The Night Cloak could not be used to breach the place without being seen.
No one knew where the spirit hall was, either, so it'd probably be quite difficult to locate in the midst of an attack.
After fighting Thunder Hell Emperor, Han Sen had learned a thing or two about proper Emperor behavior, though. For one, he now knew they were willing to kill themselves quickly, and they'd respawn at an alarmingly fast rate. Whatever Han Sen and his companions chose to do, trying to conquer a shelter such as that was going to prove tough.