How about being able to up a guy with a bazooka, at the spawn point. Wouldn't need to design a fancy new guy for the game, just take the troops we already have in the game and stick a tube on top of him without an icon. They can't move very fast, would only get one or two shots, and it would have to be a close shot so you should only have to worry about them around spawn points. I would hope that by adding something that is quiet and hard to see people would be less likely to camp a spawn point. If you kill troops at the base then you couldn't up them.