This idea would require upgradable outposts.
Why not have outposts "scare off" monsters of a certain strength? A level 1 outpost would scare off weak monsters, level 2 medium, level 3 strong?
Beyond that no effect.
I'm just getting really annoyed at monsters attacking my improvements adjactent to outposts. It's impossible to defend all your territory, so most of your stuff will get razed by random weak/medium monsters.
