Lobotomites, without a doubt. They may be idiots, but they have far better weapons. I remember getting fragged by lobotomites carrying brush guns and hunting revolvers, while Gary's don't get anything better than police batons or 10mm pistols, and rarely .44 magnums.
As for a good fight, I'd like to see Talon Company versus Regulators in an all-out battle. You rarely ever see them fight each other, but they're supposed to be rivals.
"They asked me how well I understood theoretical physics. I said I had a theoretical degree in physics. They said welcome aboard."