I’ve also listened to Blueprint for Armageddon twice. It’s his best stuff. King of Kings and Ghosts of the Ostfront are good too.
For whatever reason, I started to get bored with King of Kings. I think Ostfront is not free, but I’ve read that it’s supposed to be really good. One of these days I’m going to go spend the $50 or $60 or whatever it is to get his older stuff.