Ive been doing instancebuddy with 2 toons in the group queueing, the xp is pretty fast.. I just put them both on instancebuddy and toggle leader plugin (so wont queue without being in group) and they work fine, the only downside is after each instance you need to regroup them.. but its fast, done it 63-75 so far in 1.5 days. I made paladins so one is a holy and one is ret.. works just fine, holy gets the group fast pops. Not sure how u can afk raf questing, so I did instances.. painless and easy. I play TF2 in the meanwhile and just group then up then they requeue again..