The two Saints, facing such a homeless situation, have the following possible outcomes.
Outcome 1: With good luck, they find a universe without their own seat and settle in successfully.
Outcome 2: Invade other universes to settle in, compete with the local Saints for their authority, and drive the opponent away, but ninety-nine percent of the time, they are not successful.
The opponent has the home advantage; do you think the Saints in that universe wouldn't help their friends fight you?
At home, they are without various means?
The possibility of a deadly failure in a strong assault on a new home is extremely high!
Outcome 3: No matter which parallel universe they travel to, it's already locked tight; they can't even enter, let alone start a war. They can only wander around, with no way to replenish their strength, like rootless duckweed, slowly withering away to death.
As expected.
