I just started RAF leveling today so i might not be an expert, but this is how I'm doing it.
Materials:
You're optimally going to want 6 accounts (I recommend buying battlechest keys off a trusted seller to skip the trial account restrictions instantly) and at least 5 hb sessions worth of keys.
Setting up the WoW accounts
1. Go on whatever bnet account you're going to use (im doing this over 2 bnet accounts) and redeem one of the keys. This is account 1.
2. Log on to account 1 and send an RAF request to yourself, redeem another key and link account 2 to 1. (The bnet can be the from the same account you sent the raf key from)
3. Log on to account 2 and do the same thing until you have the 6 accounts chain linked.
Setting up HB:
The goal is to level accounts 2-6 then promote account 1 to 90.
Leveling the bots to level 15 is the hardest part but using a simple mutlibox addon (I used basicboxer) should allow you to get to lvl 15, you should be playing on the tanking character if you want to walk into a dungeon at level 10. (Make sure to turn off automatically selected talents so you can pick the spec of each class when they ding 10)
Make sure youre doing quests, as grinding mobs with 5 bots is not ideal nor efficient. (If you're on horde you can do the orc starting zones till you achieve level 10, then manually walk into Ragefire Chasm)
After getting to level 15 you can make a 5 man dungeonbuddy team (Guide on how to do that is on the Dungeonbuddy page).
Make sure you dont run this team afk or 24/7. Their are risks with having your own 5 man dungeon team.
Have these bots run till lvl 90, afterwards use account 6 to promote a new character on account 5 to 45 then promote account 4 and so on. Make sure to promote with the lowest level character first. (You should end up with 87 grantable levels on account 2, so make sure you have a level 3 on account 1)
After getting to 90 on each character, its up to you how you'll get them to lvl 100 and gear them.
I started at about 9 am today, theyre currently 62 as of 11pm but i took a break for 6 hours.
Hope this helped,
notMrT