With the Noob v Vet game now having finished, maybe you'll get an influx of players for the 'normal' nations in this game, allowing you to get your desired Overlord : Normal ratio. I'm sure there are now a few confidence filled noobs out there from that game who want to show that their downing of the Vets had nothing to do with numerical advantage
Best of luck with the game everyone. And hope it develops more-or-less as intended.