Very good perspectives on 5shaman /4shaman+1pala

I think I'll boost my self and gift my other toon. But how does that work rlly? the Main account gets to give lvls to another account linked? Because without the main account you do not get RAF xp
Then I'm not able to get 5 up to 60? you can only have 5 people in the grp, 4 of them is RAF and the 1 boosting is not

And how much more time does it take to just quest normaly?