New to multi-box

[SuperMiguel]

On account A i already have 9 80+ lvls, and a single one (new created, lvl 54 at the moment) on the other ones...

would it be a good idea to level all 11 classes on each account? as it seems that with a booster and RAF it goes fairly quick, like i did 0-50 with a full 5 man team (which was a bit slow)... Also im not enjoying it as much as i tought i was going to but thats maybe because im only leveling and not pvping, so not sure if "for me is worth it" the $75 i guess i have 30 days to keep going at it.

Like one side of me wants to just finish my shamans or make dks, and just go and enjoy BGs, and destroy people, but then if i want to change to another team i wont have RAF available and would be a big pain to lvl all those toons with out it