I am finally got my 2 box working the way I want (mostly, still playing around with the macros)

I will going on a 4 day vacation starting Tues, I am plan to play wow for 3 of those days.

I am thinking of getting 3 more accounts, 2 RAF to my 1st account and 1 RAF to my 2nd account.

I want a 5 lock team or 4 lock and a priest I want to level as fast as I can.

In my first account I have a level 70 aff/dis lock, on my 2nd account I have a level 60 demo lock.

My question is, which will be fastest, using this 2 to pull 3 new toons, start with 5 new toons, or use my 70s to pull 4 new toons.

I read the RAF a few times and it said for the 300% bonus experience, toons cannot be more than 4 levels apart.