So, due to some naming-issues on some of my accounts (I have 5 level 70 shammies although 3 of them are on account not in my name), I decided not to risk it and level 3 new chars on 3 new accounts which I've purchased and activated. I have a couple of questions in that regard.

On account 1 is my main lvl 70 shammie and my old main (lvl 35 paladin). On account 2 is just the lvl 70 shammie. Since I have to start over levelling 3 more shammies, I was thinking about just using one of my level 70s to powerlevel with and level the paladin up to 70 as well so that I could alternate between a 1pala/4shammie team and a 5 shammie team. Anyway, my question is this: Does it significantly impact my xp/hr level if I just powerlevel with 1 lvl 70 compared to if I powerlevel with 2 lvl 70s?

With regards,
FB