crowdx - do you want to become 10boxer (6 existing plus 4 new) or stick to your existing 6 and add more teams to your existing ? if you wanted to 10box the battlechest is probably a better deal than the $5 wow classic (which stops at 60) - if you want throw away accounts with few level 60 transferred back to your original accounts then you want to maximize how many level 60s you get through granting on existing account:

A-N1
A-N2
B-N3
B-N4
and boosting with C (unlinked) seems to me the best in that case (don't make the mistake of doing A-N1-N2-N3-N4 "best" setup which isn't best at all for that goal - like I did... from advice here ;-) )


(A,B,C being existing accounts; N1-N4 being new1-4 accounts)