Gonna level with you here man, you sound like someone who’s only interested in multiboxing for the “free” lvl 60’s... probably why no one has responded here....
but since I’m a not so nice guy, I’ll bite...
generally speaking you cant boost your toons like that while multiboxing... the community is kinda based around people trying new things with different setups and tend to deal in 5’s not 2’s... having said that there are fair few dual and triple boxes around but they leveled up as a group...
if your looking to boost a priest I suggest just getting to lvl 18 if alliance regularly and spamming deadmines till 20 and then stockades 5 times an hour every hour until it’s grey to your priest. Then moving up to Sm graveyard before getting to library. Skip armory and go straight to cath... stay there until your 43 ish and then go to ZF and just aoe farm... if your good on your mage and you can park your alt out of the way of any patrols... Mara is a decent grind spot as well.
when boosting in a group like that you get more do grouped with 4 other players... so take three random people at the correct level range... put loot to FFA, put your toon on follow of one of the normal players and just run around killing everything...
sorry for the bad news but tagging / instance aoe leveling has been nerfed to near non existence. Unless you pay a warlock to follow you around and get his imp to fire bolt any mob you tag and don’t touch it himself as that seems to be the only option at the moment
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