I used to put the pally in the pack and follow an alt.
when doing an A/V and running for the far end I used to put the pally in the back.
Normally the pally is my main and everyone follows him but with crusader aura up he would usually leave someone behind.
I fixed this by switching to follow one of the alts leaving the pally in the pack.
if the lead character got too far head he would loose the crusader aura and slow down enough for the alts to catch back up.
then I would switch back to the pally when I got where I was going.
I have a hot key for selecting which character to follow. ( something like F6 to follow the pally, F7 to follow the first alt )