I did that, it will give max exp to the lowbies, if the mobs are not grey to the booster. The problem is keeping the lowbies alive, you can stand them way back on the ledge but taking them in will get them killed most likely. Keep in mind though it takes the same number of kills to get the lowbies from level 10 to level 11 as it does to go from level 84 to level 85. Meaning that basically you have to kill the same number of mobs per level (as you get higher you get the more exp per mob). RAF would still be needed I think.

I was under the impression that all zones in the new expansion (mop) will give more exp for a similar HP mob then the same HP mob in the old zones. Is that not still true?