Boosted two teams to 60 very recently.

The first one I did SM until 40, then ZF until 45, then Scholomance. What I liked about ZF is that I enjoyed the change and I only had to do it 3 times then all the toons were ready to go to Scholomance. The only issue was that I couldn't find an unique spot to park toons so it was a bit tedious, repositioning the toons very often and always watch for patrols.

The second one I decided to stay in SM until 45 then run to the nearby Scholomance. I really regretted that choice. Until about level 40, toons would earn XP quite fast but it seems that as soon as the mobs fall into the "green difficulty" range, the xp you get from each kill suddunly drops a lot and it's becoming too tedious to stay worth the effort

For the next team (and hopefully the last one) I'm going to create I'm still undecided whether I should give BRD a try or return to ZF.