and remember that it isn't the monsters lvl, but its hitpoints, you get exp depening on how much you hit, so a monster with tons of health and low defence is perfect (too bad we cant kill pures whenever we want to they fit that profile perfectly) a good choice is whatever you can 1 hit (chickens, men, goblins) that way you'll get lvls fast and wont have to bank too much in short: lessers are horrible exp!