Was there any chance in getting Rampant and RSO working together on this again?
With enabling Vanilla enemies and disabling RSO's, I'm finding the only way to push enemies back from my starting position is to use the Starting area size slider, but this causes other side affects, like pushing the resources around and (for what ever reason with the combination of mods I'm using) initial map generation takes longer (which is a pita during map hunting).
Unless there's a way for a mod to do enemy cleanup around a configurable starting area that won't affect resources....
Edit: Should've kept experimenting. Found that decreasing the Size slider on the enemies tab to 50% caused the two bases nearest me to disappear. I'll leave this post, though, as it'd still be nice....