We were running lowbies in our guild today to help them level, and found out that high lvl pally auras currently work on lower lvl toons instead of scaling down.
If your lil buddy keeps dying, throw on Dev aura for over 1k armor. If you want to run it faster, ret aura hitting for over 100 is pretty tasty on a lowbie.
Its really great if the person you're running keeps getting agro.