Once you get to level 8 and finish the Goblin King's Slippers quest, groups of Lomar Smashers and Archers will appear in Prindle Forest. Lomars are quite easy to kill and their moves are easy to predict, they drop Bronze Ingots and gold, Bronze Ingots sell for 10 gold each. One group of Lomars gives some good experience too, hunting them at level 8 for less than a day can get you to about level 13.