I spend most if my time in the IC Market District and Skingrad. I kill everything in Rockmilk Cave and Memorial Cave, which lasts till maybe 3 or 4 pm game time (I actually start at midnight, just for fun), fast travel to the Market District, take the cool looking things to my Skingrad house, wait until the caves reset, and do it all again. Oh, and the arena, Minotaur Lords don't slaughter themselves. Well, maybe with a frenzy spell, but thats another story...