60-80 aint to bad, in 70-80 i made like 8hours/lvl just doing quests with 5 guys(this is very boring when you have done it some times) im sure you can get it down a few hours, just posting my time, never tried to do instances/boosting them tho dunno how effective that is.. 60-70 is quick doing quests or instances, shouldnt take to long..