Like Chenier said,
We've seen this done time and time again over the years. The reason were giving the suggestions we are is because the current method isn't working. Expansion on Dwilight doesn't (often) bring any realms into conflict with any others, all it does it create a horde of monsters that assault your walls and you're stuck fighting them off for months until you get bored of doing that and your players leave. It happens over and over again.