My plan is to AV (or other PvP's, but predominantly AV) from 71-80.
I have a team, which did quests and some of the collections are stupidly annoying.

At the moment, I'm working on a mixed team.
I've decided to go with a Mage for the 2nd toon on the team, instead of a Hunter.
So I'm boosting the Mage at the moment.
The tentative plan is to AoE boost to 68 or so.
Then see which is faster Quests or further boosting AoE.
At 71st, I'll move the toon (with 4 others) to pvp's.

If you're winning in AV, and getting 425k an hour, that's probably better then with this.
But, if you're not winning in AV, then this style of boosting is definitely better.
Mix and match, they're both excellent exp's.