I don't have many alts I have 2 level 40's and 2 level 20's and 3 that are 60+ already.
I'm thinking of just referring for 4 new accounts now so I can run 2 groups of 4 to get the horses on my main 4 Shamans and get the 3x bonus XP.
I level kind of slow I'm 10 days played at level 51 at least I think it is slow at first I thought 3x the XP would cut my leveling time to 1/3 but now I see that rest XP is not used.
So now I see that if it took 10 days with rest XP it would take 6 2/3 days with 3x the XP and I'm not sure the bonus is really worth it.