I just got one mixed team to 70 and my next team is at 67/68. I just did all the quests in outlands that didnt involve gathering. I cant answer the boosting part except to say im boosting a couple much lower toons and find it mind numbingly boring. Im doing it because its the only way i can fill out a fifth account for free. You dont have to boost since you have a viable group to quest and instance with. Other people can answer this: at what level does boosting with an 85 start taking nearly as much time as it does to level the regular ways.

You can either quest, do instances, boost, or grind. After 60 isnt it pretty much a progression directed by the game? You dont have to wonder Now where do i go after you leave the original continents.

My plan for my teams is to quest and only do instances when i have quests for them. I'm looking forward to seeing what more experienced people have to say.