level faster with high lvl outside group?

[Sam DeathWalker]

For tag boosting to work well you have to kill mobs that are not grey to anyone, those inside the group and those outside the group ....

I forget if the level 72's at the dragonblight camp are gray to 80's or not but if they are not thats where you should go (the 5 camps of soldiers near naxx). Group one 80 and the lowbie to tag in a group and the rest out of the group (make sure they don't tag). You will get 11/99 of the exp on the lowbie which with a level 72 mob I am sure will be max red exp. Plus you get the group bonus (not much with 2 person group but more then zero). Of course the more out of group killers that you have the better, 2 level 80s wont kill mobs super fast.

Having the lowbie in DB increases your pull radius also lol .....

The hard part is keeping the lowbie alive but your 80 in the group should draw agro from the tag its the "late comer" mobs that will attack the lowbie.