Yes, we have a Guardian and a Warden in our MT group. Although basically I'm in MT group to do health buff and off tank, often I do MT with 2nd Guardian when our main Guardian is not online. Or I do when we need to keep aggro hard like Nagalik and K'Dal. If we have Fabled Gears, we can tank better. But I think important things to do MT are keeping aggro and professional healers' backup. Just harder w/o fabled gears.
Destructive Rage, Uthors' Sperior Tactics, Screaming Fury, Battle Tactics, Tides of War, Anarchy, Unbridled Fury, Focus Rage, Unflinching Will, Darkmoore's Protective Advance
Those are my regular buffs. And those are Master I or Adept III. I didn't use Controlled Rage because mine is still Adept I.