what you need conan is to like...
improve things..
the spawn room is to close to the actual creep point. It's also way to easy...
I mean sure eventaully it gets hard but for the first 10 minutes its just to easy..
Also i think more opening and closing doors would be cool, kinda like OMG ITS APPROACHING THIS HALLWAY QUICK CLOSE THE BLASTDOOR. That would seal the hallway off. But then you gotta have a small vent around it :).
Little things like that make it fun, also lights really lag... so your gonna have to disable them on players.
Also think the main creep spawn needs improving.. it's just so small and concieved.. theres 4 small ways to get out for the thing.. just make it so you cant contain it in its spawn.
I think the one problem is that your thinking of actually winning conan. The main objective should not be to clean the entire thing up, but to Hold it back as long as possible the creep should always be winning.
Just a few suggestions :)