Question on starting new 5 box with warlock

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.

the 300% xp bonus wont work if you pull your lower toons with a highlevel main.
maybe its faster to level 5 new toons since the 300% increase is a lot.
remember that you can grant a level to a lower toon every 2 levels you make.
which would be 102 level if you hit 70 with all 3 toons in the raf 3 month.. 3 "free" level 60 chars for you :)

If you have a non-linked account to boost with (as in, not in a RaF chain at all), you can get 300% XP on 4 other chars.