Goal: To fill main acc with 60s by RAF

Recently i tried 3-box. Got three shamies to 30 by mix of quests, LFG and a bit of PvP. While it was good fun I decided that it's not for me and now just want to use remaining RAF time to fill my main account with lvl 60s of all classes by transferring levels.
What will be most optimal way to do so?
- Level in groups of 3 by quests
- Run LFG dungeons with tank/dps/priest
- Boost two slaves through dangeons by lvl80 from main acc
I understand latest may be fastest, but with first two i'm getting one 60 dude and total of 60 transferrable levels, while with second i'm getting only levels. So how big is difference in speed ?
(I'm considering just moving chars from slaves to main, but only if i'll became terribly bored)

Boosting will probably be the fastest, especially if you have even a half geared 80th booster.

If you went:
A >> B >> C

You boost BC with A, from 1st to 60th.
Boost a second set, also to 60th.

That gets you, a full 60th on A, and a full 60th on B.
The granted 60th on B, gets you 30 more levels on A.

Boosting four toons on BC with A, gets you:
Two toons on A from B (and two toons on B from C).
B can then give another toon to A (cascade granted levels).

So A gets three toons at 60th, from boosting four toons on BC.
And each toon takes 1/3rd the normal leveling time.
So in the time it takes to level 1.33 toons (without RAF) you get three toons.




Conversely, if you were to level three toons, on ABC, but do it twice.
All are the same level, so no boosting.

You get two full toon on A, from the leveling.
And another full toon on A from B.




I'd tend to think you could boost four toons, with an 80th, in a lot less time then leveling two sets from 1st to 60th via questing without a booster.

Boosting the four toons gets you three toons on A.
Leveling two toons gets you three and a half toons.

Thanks for answering.
Though i don't understand why do you suggest A>B>C. 4 pairs on BC will give me only 3 toons for A, but if i were to make A>B A>C i would get four.
Slaves wouldn't benefit from 3xXP bonus anyway since 80-booster A is connected to B and present in group, wouldn't they?

No. B & C would still get the triple xp bonus because they are linked. A wouldn't give it to B, but B would give it to C