The most efficient method for RAF'ing is a reverse stair-step based on the number of toons you're trying to level. If we accept the premise that each consecutive level takes more time than the previous one, the reverse stair-step becomes clear. Let's use an example of 6 toons, which you want to level to L80 for your professions.
#1: Level to 80
#2: Level to 72, gift the final 8 levels
#3: Level to 63, gift the final 17 levels
#4: Level to 53, gift the final 27 levels
#5: Level to 39, gift the final 41 levels
#6: Level to 20, gift the final 60 levels
Now, one big thing to remember is that a toon cannot gift levels above his own level. So, before you gift ANY levels, you need to finish the levelling part of the above.
Then you do, in this specific order:
Gift 19 levels from #5 to #6
Gift 13 levels from #4 to #5
Gift 13 levels from #4 to #6
Gift 10 levels from #3 to #4
Gift 10 levels from #3 to #5
Gift 11 levels from #3 to #6
Gift 9 levels from #2 to #3
Gift 9 levels from #2 to #4
Gift 9 levels from #2 to #5
Gift 9 levels from #2 to #6
Gift 8 levels from #1 to #2
Gift 8 levels from #1 to #3
Gift 8 levels from #1 to #4
Gift 8 levels from #1 to #5
Gift 8 levels from #1 to #6
The pattern may not be obvious. The idea is that since you can't grant levels above your level and since higher levels take longer to quest through, you ALWAYS want your highest level toons granting the highest levels to your other toons. This is why #1 grants levels last, and he's the guy that gets everyone to 80. We knwo you're able to grant 1 level for every 2 levels you earn. So 80/2=40. The most efficient method, then, is to split those 40 levels among the 5 remaining toons evenly, but in a manner that gets them to 80. Now, that means #2 only has to level to 80-8=72. He will get 72/2=36 levels to grant among the 4 remaining toons, so he'll grant each of them 36/4=9 levels.
Now, that means #3 only has to level to 80-8-9=63. He will get floor(63/2)=31 levels to grant among the 3 remaining toons - the division here isn't even, but we always wanna keep it as even as possible and give any extra levels to the last toon. So that means #3 will give 10 levels to #4 and #5 and 11 levels to #6. The reason we give any extra to the last guy is strictly because we really don't want to level the last guy because he will have levels that we won't really be able to grant to anyone (maybe a bank alt), so we want to minimize that waste.
You can see that the math works backwards, and that's why I like to call it a reverse stair-step. You can always RAF yourself and double up on this for triple the levelling speed - if you're into multiboxing. I've done it - but not with 6 toons on each account - it's worth trying out.
Retired - I blame Kathroman for everything.
(that's a joke, eh)
surprised at the amount of people here who quest with RaF, what are your times like from level 1 to whatever you end at?
generally I can get from 1-80 in about 7 hours grinding dungeons through LFD (with 1 of the 7 hours being spent leveling just to 15 via quests)
I've been doing RAF with a friend and it took us 10 hours to get to 80 as a Prot Paladin/Warlock with heirlooms. Granted, there was a lot of room for improvement in terms of run speed.
I tend to prefer questing for RAF if I don't have folks I know available to burn through dungeons with, and it's given me about the same speed of level gain as I'm seeing reported here. It's a matter of personal preference, I guess. A few efficient quest chains can yield tremendous experience without having to contend with queue times or "lolIpulledallthemobs" types.
When I was doing a lot of RAF I had a couple of lists of the most efficient quest chains for both Alliance and Horde leveling. I'll see if I can locate them; if I still have them I'll post them.