There is no auto-cf.
Any use of the oow surrender function in-game is dependent on 4 factors:
1. The two kingdoms cannot be in range of warring one another (First strike against your plan)
2. The two kingdoms must be at 100 points variance (Will you have the activity to maintain this in the face of daily meter decay when it approaches that point?)
3. The surrendering kingdom cannot have made a hit in the previous 12 hours (this one at least they have likely met)
4. The surrendering kingdom actively has to use the Surrender option (it's not automatic, it's a choice they need to make)
As you can see, your plan to rely on the surrender mechanic is flawed on at least two of the 4 points. Time for a new plan?
