The next thing they decided on was how to attack the first tribe. Now that they know the importance of Oracles, they have made it a priority to eliminate the Oracle first.
To do that, Legion-3 instructed Warshaw against attacking the tribe directly. They have the advantage of troop size and even have wolves to assist them, but they are not willing to put their believers in danger when it can be avoided.
That's why he instructed her to sneak into the tribe and assassinate the Oracle. That way the ascended god will become cut off from the tribe. His tribe will also become cut off from their god. They either surrender or Warshaw kills all of them for souls.
It is a good plan. But Legion was still anxious because they couldn't get live update yet. Warshaw had to be updated first about events before she could update them through prayer. That kind of delay can lead to catastrophic consequences in battle. Unfortunately, there was nothing he could do but watch.