Is boosting 4 lowbies w/ a 110 more efficient than running a team post 7.3.5? I'm just starting to get my teams to 15. I have a 110 Blood DK on my main account w/ 4 fresh RAF accounts. My plan is to level 5 teams: Hunter, Druid, Paladin, Shaman, and Mage. all accounts have heirlooms.

Thanks .