I foundout that for botting, grinding works best. If I use instancebuddy I get many crashes while entering an instance (on loadingscreen) or my toon dosnt find the way bet into the instance.
Questing is a nice methode but still too buggy for me. In Borean Tundra in the Warsongkeep it get stuck many times on this ramps out of the pit.
PvP-Bot is way to dangerous, too many ppl can see you acting like stupid because of getting stucked anywhere.
So grinding is the trustiest way to get your toon up the way form 1-85, not the fastest and not the coolest but the trustiest =)