Well, if you can get 5 toons to que for randoms together, leveling is super fast. Boosting is not necessary. You will get a full level from just getting the bonus quest from completing the randoms. In this case I would just chain off of your Main account. Just make sure every group you level up, at least one can que tank and one heals....... This way boosting is not needed and would be much less of a pain in the ass. Plus, you actually get to play the group instead of dragging them around.