Yup, i did the same thing, realized that for the quests i was getting from the thousands of exp points i was spending from mind reading, i wasnt even getting an exp profit, just 1 less to do and maybe some crap weapon that i already had 10 of lol, best way i leveled up was basically just, as soon as i can turn into the dragon, just go straight to those flying fortresses and kill all the dragons (except commanders cos they are impossible at that level) and blow up all the defences, you can get anything from 1500-2500 exp per kill depending what it is you kill lol...
Killing a level 28-29 when your only level 19-21 is a rather large amount of exp
