You could have the booster do all of the quest work and just drag the boostees around on autofollow. Granted, there are times when you'll need to loot items (Collect 5 Panda Spleens or whatever), but the looting isn't as bad when you have AoE looting.
As for AoE grinding, I used Deepholm a week ago, on that one spot with the Troggs. Evidently they've shut down XP on the ground-floor guys, but the ones that are way up a cliff still give XP. I'm at work so I can't be more specific than that, but I think I found it by googling "Cata aoe grinding" and "Mop aoe grinding".
Also, remember that the chest/shoulder heirlooms actually work until the moment you ding 81. The pants/hat/cape last until the moment you hit 86 (even though their stats are inferior to quest items by that level)
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