Ok I've read through the threads and it seems like the way to go is buy 3 more accounts and boost with a main. Still waiting on confirmation on this.

your accounts should look like

Main account(booster)- AcctM
Second account(invitee) - Acct2
New account one(linked to second) NA1
New account two(linked to second) NA2
New account three(linked to second) NA3

If you create a new alt on Acct2, NA1, NA2, NA3 group them for the first 10 levels that should get them to 10 in about 30 mins. Then you boost with the AcctM. They are all linked, grouped and get 3x the exp. From a boosting perspective this has to be the fastest way to level. You may need to give a level or 2 to the new alt on Acct2 so he can keep up.

At 60 this gives you 90 free levels to distribute to alts on Acct2, although I'd probably just level the first 10-15 levels cause the first few levels would be a waste for the free levels.

bang 4 60s in probably less than 36 hours, You could probably have 9 59s on acct2 in a month leveling other teams.