I would like to see a slow ponderous heavily armored unit with a relatively powerful but shout range weapon. Something like a tribute to The Can. It could be useful as a level one or level two unit. It could bulk up your level one army with by giving it something that can take a little damage or if it were level two it could specialize primarily in defensive roles and be used as the first unit through the star gate when invading or a last ditch effort to protect your commander when being swarmed. I should think it would balance nicely as a level two unit if it had about twice the armor of a Leveler but about half the speed and half the range. The firepower could be comparable to that of the leveler.