There really isn't an option for that right now. Your best bet is Lazyboxer, but even then, gathering quests won't work and you'll have to babysit the bot pretty much through the entire leveling process.
You're better off leveling through dungeons completely. 1 tank, 1 healer and 1 dps and just use random queue all the way to 85. You'll get anywhere from 5 levels at level 15 to half a level from 80-85. Leveling to 85 takes right around 1 day played time with this method with minimal xp boosts.